Abstract
Sassanian metalwork is one of the most influential ancient arts in Islamic art, especially metal working. in the art of this period, aesthetic dimensions including all kinds of mythical and symbolic concepts in the art of metallurgy were revealed. with the advent of Islam and the development of the art of metallurgy, in addition to the aesthetic dimensions, the technological aspects including methods and techniques of making and decorating in the art of the metalwork of the Islamic era and especially the metalwork of Mosul reflected and continued. in the metalwork school as one of the most prominent centers for the production of metal works in the Islamic world, various types of metallurgical works were produced and presented for various purposes. in these works, there are well-known traces of various types of motifs and concepts commonly found in the Sassanid Empire. therefore, the important question of this article is: what are the motifs and concepts used in the works of Mosul metal that is influenced by the art of Sassanian metallurgy? concepts such as hunting (riding or walking along with arrows or arrows or sword), two beasts on either side of the sacred tree or life, the sultan (motif) sitting on the bed with legs stretched out and servants in Two sides and a hand on a sword or in a quadrangle (And the crescent of the moon or cup of wine in hand), Bahram and Azadeh, bass, dance and music, plant motifs including the tree (cypress, pine), tangled and interconnected ivy (slavic), various flowers (lilies , Leafy leaves, multicolored flowers), animals and birds (lion, hog, bear, elephant, camel, ram and gooseberry), gazelle, deer, ram behind me, hawk (eagle), birds in front. Pearl strings (rows of round shapes). is the result of this research? This research is of fundamental type and research method is descriptive-analytical. the method of data collection is in the form of a library and search in museums.
Keywords: Sassanid, Seljuk, Metal Working, Khorasan, Mosul.

Introduction
During the observation of Iranian art and its civilization, it is possible to find a lesser period that was as impressive as the Sassanid art of the art of the contemporary civilizations and, more importantly, beyond itself. metalworking is one of the most prominent Sassanian arts that has made itself in the manufacture of all types of metal works, especially silverware. Artists of this age, using the techniques of making, decorating and reflecting many old Iranian beliefs and traditions in metal works, have preserved the identity, artistic values and experiences of the past, and transmitted and continued it to the Islamic era. the artistic work of the Islamic era and the geography of Iranian civilization, especially during the rule of the Seljuk Empire, expanded rapidly in the light of security and tranquility, and outstanding metallurgical schools appeared in the production of metal works such as Khorasan and Mosul. artists active in these two schools, while paying attention to and modeling the Sassanian art of art in technical and artistic dimensions, were able to with their innate innovations, ingenuity and creativity, as well as the attention to common religious beliefs in some sciences such as astronomy and astrology, the nature They created a new artistic dimension for this art. the mentioned schools, especially Khorasan, were very dynamic and thriving during the Seljuk period. In addition to the influence of Sassanid art, there were significant effects, especially in decorative styles, on visual effects and roles on the metal works of Mosul. in fact, Mosul was directly (neighboring the Sassanid-Madan capital - and included in the Sassanid civilization) and indirect (the modeling and influence of the metal art of Khorasan through the interactions and the migration of artists from Khorasan, especially the artists of Herat to Mosul in the direction Mongol invasion) has benefited from Sasanian art and this is evident in Mosul’s works. The purpose of this research is to identify the dimensions of the influence of the Sassanian metalwork art on Mosul’s metalwork, its introduction and documentation in order to protect and protect an important part of Iranian art and civilization. what are the motifs and concepts used in the Mosul metal works affected by the Sassanian metalwork art? the topics discussed in this article are as follows: The influence of the Sassanian metalwork art on the art of metalworking of the Islamic period, the impact of the Mosul metal school on the metalwork of Khorasan [Herat], and the impact on other metalworking schools, the general coordinates of the Sassanid metal works of Khorasan and Mosul, decorative practices and content (Patterns and roles mapped from Sassanid art and specific themes and roles of Mosul) Mosul metal works.

Type and method of research
This research is of fundamental type and research method is descriptive-analytical. What is the way to collect data in a museum-like book-house?

Conclusion
The most important result of this research is the introduction and reflection of the concepts and motifs of Sassanid metal works in the metal works of the Mosul metalwork school. Hence, the metalworkers have been instrumental in aesthetic and technological aspects of the methods of making, decorating and paying the art of Sassanid metalworkers through the metalwork school of Khorasan during the Seljuk period. In the aesthetic aspect, we can refer to a variety of themes and motifs commonly used in Sassanian Iranian art that also reflected Seljuk art. The themes of hunting, the two beasts on the two sides of the tree of life, the Sultan (ruler) sitting on the throne with legs, Mars and Azadeh on horseback, which, of course, has been used in camel works in place of horses, music, Dance, plant motifs including the tree (cypress, pine), various flowers such as flowering flowers, palm trees, etc.

Abstract
Greater Khorasan, which is now divided into six countries, in addition to its geopolitical importance, have great historical importance due to the formation of the Parthian State and then the powerful presence of the Sassanid Empire along with the expansion of territory and protection of borders against the invasion of the Eastern nations. Despite these reasons, there is little information on past events in the area in the historical and archaeological sources. Iranian Khorasan occupies a large part of the northeast and east of the country. Archaeological survey in the middle part of the Kopeh Dagh-Ala Dagh corridor in northern Khorasan has identified various sites from the Parthian and Sassanid eras. Among the identified ancient sites, sixteen architectural structures were identified in the form of a fort. Recognizing the differences and similarities between the architecture of the forts with each other and then comparing them with other similar examples inside and outside the borders of Iran, led to a better understanding of the fort-building styles and their grouping in this region. In this research, in addition to identifying forts and recognizing their architectural features, using remote sensing, ecological studies and the type distribution of forts from each other. This article emphasizes the socio-political role of the study area as the last border access to the central plateau of Iran.
Keywords: Northern Khorasan, Kopeh Dagh-Ala Dagh Corridor, Tappe-Ghaleh & Forts Parthian, Sassanid.

Introduction
To understand the cultural developments of the Parthian and Sassanid communities in the northern region of Khorasan, it is important to know the nature of the settlements of this period. In written sources, Greater Khorasan is often depicted on the northeastern edge of the civilized world. This region has always played a dynamic role in ancient times due to the function of the pathway and the connection of the East to the West in the field of population movement with the entry or invasion of nomadic tribes and cultural exchanges. The origin and emergence of the Parthian state, the development of eastern territories and the control of borders and communication routes, and the monitoring of trade were other reasons for the importance of this region during the Parthian and Sassanid eras. These subjects had caused the geographical-political-administrative boundaries of the two governments in Khorasan to be constantly changing.
Aims and Necessity of the Research: Typology of forts of Parthian and Sassanid historical periods in the middle part of Kopeh Dagh-Ala Dagh corridor is part of the purpose of writing this article, in addition to the identification of architectural styles and their comparison with other simultaneous examples in the territory of these two governments. The function of forts and their role in the socio-administrative structure presents their historical context and also highlights the importance of the studied geographical area in the political-governmental structure of the Parthians and Sassanids.
Research Questions: What are the architectural features of the forts during the Parthian and Sassanid eras? Is it possible to provide a relative chronology for forts based on architectural features? Did the form and shape of the forts affect their functional role? What was the position of the studied geographical area in the Parthian and Sassanid historical governmental structure?
The middle part of the Kopedagh-Aladagh corridor is located in the northeastern part of Iran and northern Khorasan and is based on the political divisions include the cities of Farooj and Shirvan in North Khorasan Province and the city of Quchan in Khorasan Razavi Province. 
The first systematic survey was conducted in 1977 in the Upper Atrak area (from the western part of Quchan to Shirvan). Archaeological studies have been re-conducted by the author in the last two decades in the middle part of the Kopeh Dagh-Ala Dagh corridor. These studies led to the identification of various sites from the Parthian and Sassnid periods. These studies led to the identification of various sites from the Parthian and Sassanid eras. Sixteen architectural structures were identified in the form of forts. Recognizing their architectural features, differences, and similarities with each other and then comparing them with other similar examples inside and outside the borders of Iran, led to a better understanding of forts construction styles and their categories in this region. By studying the characteristics of forts, they can be divided into two groups according to their geographical location. 1- Mountain fort: Two mountain forts are located on the northern and southern slopes of the Middle Mountain Valley. The position of these two sites is very significant because they had complete control over the opposite plain and the surrounding area. 2- Plain forts: As it is clear from the title, this group of forts is in the plain but based on their physical characteristics, they are divided into three subgroups: a) single forts. b) a fort with a non-enclosed settlement area. c) enclosed settlements. All the structures introduced in the three groups of plain forts, despite the differences, also have common points with each other, which indicate the existence of a common style of architecture and its continuation from the Parthian to Sassanid period, and the differences can indicate the different functions of these structures.
The eastern borders of the territory of the Parthian and Sassanid governments have been one of the main gateways for the invading tribes such as the Scythians, Khyuns, Heptalians, etc. These attacks often occurred from three entrances. 1- Merv route to Mashhad-Neishabour, 2- Herat route to Taybad-Neishabour, and the third route was crossing the northern margin of Kopeh Dagh and entering from Gorgan to the central plateau of Iran.  But in northern Khorasan, the Kopedagh mountain range, as a natural wall, has been part of this defensive system. The Kopeh Dagh-Ala Dagh corridor in the east-west direction has been a geographically enclosed and closed area between two wide areas, namely the Akhal plain in the north and the central plateau of Iran in the south. Therefore, due to this natural feature, it has played a deterrent role against the direct attack of the invading tribes on the central plateau of Iran.

Conclusion
By studying all the conditions affecting the subject of political-administrative, economic-social and military structures in the middle part of Kopeh Dagh-Ala Dagh corridor, it can be concluded that this region, in addition to having relative military security, economically meets the needs of the region’s inhabitants (although it was independent, but politically it had to be under the tutelage or part of one of the satraps of its time. Perhaps it can be argued that due to the density of Parthian and Sassanid castles and sites on the southern slope of Kopeh Dagh, especially their density in front of a passage in the north of Farooj city, was due to a political and administrative relationship with a city in the north of the region. According to archeological excavations and historical sources, the two important cities of Nisa and Merv from the Parthian and Sassanid periods in the north of this region have been the political center of the region. On the other hand, based on the interregional route, the northern and southern parts were interconnected, so the region may be politically subordinate to one of the two states of Parthia or Merv, depending on the time and government.

Abstract
The Bronze Age Greater Khorasan culture is one of the most important protohistoric cultures of the Western Asia. This culture is characterized with its architectural remains with a pre-designed plan, stamp seals, compartment seals, chlorite statues, combined figurines, precious jewelry of gold and silver and so on. For the first time, the remains of this cultural complex were obtained from the sites in the Bacteria and Margiana. For this reason, these lands were introduced as its origin and this cultural complex became known with this name. However, some researchers place the origin of this culture in Khorasan, Iran. However, due to the fact that until recently no site of this culture had been identified in Khorasan, it remains arguable. The primary purpose of this study is to study, summarize and classify the works on this culture in the Iranian Khorasan that have been published in the last two decades. The results of this study, along with other findings of this culture, will be taken in the wider area of West Asia until the cultural world of the Bronze Age of Greater Khorasan Culture became more widespread in the future. On this basis, it is necessary that the monographs and the small number of publications in this area be collected together and in the form of a collection and in this way, a new look will be taken at the issues related to this period. This research is based on the research of solid libraries. It has been assumed that the works obtained from the Bronze Age of Greater Khorasan Culture in Iranian Khorasan, have some deficiencies compared to other regions, such as: the south of Turkmenistan and the north of Afghanistan. 
Keywords: Greater Khorasan, Bronze Age, Bacteria and Margiana Archaeological Collection, Greater Khorasan Culture.

Introduction
The Bronze Age Greater Khorasan culture was first identified and introduced by Victor Sarianidi from the Dashli site in Bactria, northern Afghanistan (Sarianidi 1977). At about the same time, artifacts from this culture were found in the southern Turkmenistan from Margiana oasis (Hiebert 1994:165). The similarity of the material culture of these two regions has led some scholars of Bactria and Margiana to be considered as the nuclear of the formation of this culture. For this reason, the term Bactria-Margiana Archaeological Complex was given to this culture (Sarianidi 1990, Hiebert 1994). This culture is also known as the Oxus Civilization (Francfort 1989, Lamberg-Karlovsky 1994). Recently, artifacts of this culture have been obtained in Iranian Khorasan (Biscione & Vahdati 2020, Lunou 2018). Bactria, Margiana and Iranian Khorasan all are defined in the territory of a land that is close to two millennia known in historical sources as Greater Khorasan (Dana 2017). Cultural cohesion of Greater Khorasan is acknowledged by researchers (Yarshater 1997). Evidence of cultural integration in this land has been documented since pre-Achaemenid times (Vogelsang 1992); to the extent that D’yakonov believes in the existence of a kingdom in the eastern part of Iran, the center of bacteria in the pre-Achaemenid period (D’yakonov, 1954). 
Objectives and Necessity of Research: The objective is to study, summarize and classify the works done on the Bronze Age of Iranian Khorasan in the last two decades. On this basis, it is necessary to gather the monographs and the publications on this area and this period so we can have a better understanding of this specific period in this region.
Questions and Hypotheses: What image of this culture can be presented in Iranian Khorasan, compared to other regions of this culture? It has been assumed that the works obtained from the Bronze Age of Greater Khorasan Culture in Iranian Khorasan, have some shortcomings compared to other regions, such as: the south of Turkmenistan and the north of Afghanistan.

The Bronze Age of Greater Khorasan Culture in Iranian Khorasan
Many sites in Khorasan Iran have been identified and a small number have been excavated. The excavated sites include Karim Abad of Neyshabur (Labbaf Khaniki 1381), Yusef Abad of Firuze town (Nishapur P) (Hiebert & Dyson, 2002; Lunou, 2018), Tappe Yam of Faruj (Venco Ricciardi 1980: 57-58), Shahrak- Firuze of Neyshabur (Basafa & Rahmati 2011), Tappe Damghani of Sabzevar (Francfort et al. 2014, Garazhian 2014), Ferizi site of Sabzevar was surveyed (Sabori et al. 1393), Challow Site of Jajarm (Biscione & Vahdati 2011, Vahdati et al. 2018), Tappe Eshgh of Bojnord (Vahdati 2014), Raze site of Darmian (Sorush & Yusefi 2014), Gavand site of Ferdows (Farjami 2014), Bakanda site of Tabas (Farjami 1394, Annani 1398). Also, many sites from this period were identified during the regional surveys including 15 sites in Atrak Basin (Venco Ricciardi 1980), 15 sites in Darregaz Plain (Kohl & Heskel 1980, Yusefi Zoshk & Baghizade 2012), 2 sites in Kal-e Shur Basin in Esfaryen (Vahdati 2015), 9 sites in Kal-e Salar Basin (Rezaei et al. 2018).

Conclusion 
Unfortunately, the sites related to the Bronze Age of Greater Khorasan Culture in Iranian Khorasan have been little explored. It is very difficult to get into the socio-political organization and the relationship between these sites, as the archeological excavations in this area have not been carried out on a large scale and only a few activities have been carried out. It is not even possible to answer the question whether the graves uncovered with the cultural materials of the Greater Khorasan civilization belong to nomads or to the sedentary societies. Some scholars consider the works related to this culture in Iranian Khorasan are rare. However, unlike Hiebert and Lamberg-Karlovsky (1992), it should be emphasized that these sites are not rare and Khorasan of Iran should be included in the world of culture of the Greater Khorasan. The sites in the Greater Khorasan introduced in this article, are different from in eachother based on their function. These areas were cemeteries (Shahrak-e Firuze, Challow, Tappe Eshgh, Raze), residential (Shahrak-e Firuze, Challow, Tappe Damghani, Ferizi) and workshop (Shahrak-e Firuze and Challow) and of course, the use of some of these areas is also unknown (Karim Abad, Gavand and Bekanda).
With an overview of the 14 sites and areas introduced in this article, it is possible to imagine a core of the sites of the culture of Greater Khorasan within the modern city of Neyshabur. The core includes the areas of Karim Abad, Shahrak-e Firuze and Yousef Abad. If the boundaries of this border extend, the existing areas within the city of Sabzevar (Tappe Damghani and Ferizi) can also be added to this complex. In this view, Neyshabur is not considered as a city, but a geographical area and a land known as Neyshabur. With such a view, the remarkable point is the formation of an image that later in the Islamic era is known as the four divisions of Greater Khorasan. These four parts (quarters) are Marv, Neyshabur, Balkh and Herat. Each of these sections was the cultural and sometimes political center of the Greater Khorasan during the Islamic era and played a very important role in the cultural unity of Khorasan. Other sites discovered such as Raze, Bakanda, Gavand and Tappe Eshgh are more indicative of cemeteries and trade stations. As a result, the Bronze Age culture of Greater Khorasan in Khorasan Iran is a combination of one of the main cores of this civilization and trading stations with the western regions (Mesopotamia). The Desert marginal areas such as Bakanda and Gavand are located on the main trade route north-south and east-west which connected the main cores of the culture of Greater Khorasan to the western regions of the Zagros and Mesopotamia through areas such as Shahdad and Tappe Hesar.

Abstract
The Iron Age in the Middle Asia and an important part of it that called Khorasan is a Transitional period between prehistory and historical period. This period always has many ambiguities and questions; Especially in Khorasan, where the lack of archaeological studies is strongly felt. In this area, the Neyshabur Plain has a special position in terms of archeology and is undoubtedly influential in understanding the cultural components of the Iron Age in the region. In the current study, Milad Tape, which is located almost in the middle of Neyshabur Plain, was sampled as a systematic survey. The purpose of this work is to obtain information that can be used to advance the long-term goals of interpreting the Iron Age in Khorasan, especially Neyshabur. In this regard, the most important question is how Iron Age in the perspective of recent studies of Khorasan cultural field. In Milad Tape, whose surface is flat and smooth, sampling of cultural materials has been carried out in the framework of a systematic survey in order to study the Iron Age in a comparative approach with the typology and classification of pottery. Also, by using the settlement pattern of the area and other settlement components of Milad Tape, it is possible to fully examine and read part of the unknown structures of the Iron Age of the Neyshabur Plain and, accordingly, Khorasan. According to the research results, Milad Tape, which has a settlement sequence in the Iron Age, can be interpreted in the framework of the Early to Late Iron Age of the region. Pottery typology studies, also show similarity with the Central Asia Iron Age, which is known as Yaz I to III based on the material cultural of Yaz Depe area. In general, in the comparative approach, Milad Tape samples are closely related to Yaz pottery tradition.
Keywords: Iron Age Khorasan, Neyshabur Plain, Yaz, Milad Tape.

Introduction
Among the archaeology and cultural periods of Khorasan, there is a lack of studies in the second and first millennia BC.  Although the first study of this region that led to the recognition of the Iron Age, dates back to the 1980s (Riccardi, 1980). In recent decades, archaeologists have tried to make the knowledge of this period more complete (Vahdati, 2015, 2018; Basafa, 2021, 2020, 2015, 2016). The most important archaeological investigations consist of Atrak River project in North Khorasan (Dana, 2015 and 2019; Vahdati, 2016), Daregaz Plain (Basafa & Hedayati, 2020), Neyshabur Plain (Basafa, 2017), Roshtkhar Plain (Rezayi, et. al., 2018), Gonabad Plain (Basafa, 2021) and Birjand Plain (Dana, 2014).
From the mentioned researches, it can be understood that neighboring cultures are very important, such as the ancient Dahistan culture in the northeast of the Mazandaran Sea, which can also be seen in the plains of Gorgan and North Khorasan (Lecomte, 2005) and Yaz culture (Kohl, 1984: 193).
In completing the archeological information of Khorasan Iron Age, Neyshabur plain sites are very important because of the location of Neyshabur plain and its environmental potentials (Rezaei & Basafa, 2019). Milad Tape (Fig. 1) is located in this geographical environment, which belongs to the Iron Age. Milad Tape and other sites like Se Tape can show new evidence of local cultures and cultural interactions with Central Asia.
Materials and Methods: This research relies on the material cultures that collected from the systematic survey of site. It’s most important cultural materials are potsherds, were first studied in a statistical approach and then analyzed comparatively in comparison with neighboring cultures.

Data 
In the sampling conducted in Milad Tape, were obtained various stone tools such as blades and chips, metal melting slags, furnace welds and a significant number of potsherds. A total of 1586 pieces of potsherd have been sampled from the surface of the site, and among the three general categories of rim, body and floor, the most abundant pieces belong to the body. From the total samples that can be dated in Iron Age I, the rim has a frequency of 1%, the body 93% and the bottom 6%. In the Iron Age II and III, the rim and the bottom with an abundance of 3% and the body with 93% of the total have the most parts. Among the examples that can be dated in this site, where a comparative approach was used, three periods can be distinguished from the Early to the Late Iron Age. 

Discussion 
Looking at the most important cultural material of Milad Tape, we can say that its pottery components are closely related to Central Asia. In the Early Iron Age, in this site, an important phenomenon is low-quality handmade pottery, which is considered one of the main characteristics of Yaz I. In the middle and Late Iron Age, the previous statements also apply, and its morphology also shows that similarities in terms of construction and form can be seen in Milad Tape pottery in these periods as well. In this context, double-lobe pottery, which is defined as the most important characteristic of Yaz II and III cultures, was produced in a wide range with minor changes in the Neyshabur plain.
In completing the studies, environmental factors are very important, and based on this, Milad Tape is located in the range of 900 to 1200 meters above sea level in terms of height, and in terms of the settlement pattern, it is located in the lowlands of the Neyshabur plain (Fig. 7), which has suitable land for population development. The study of Milad Tape water resources, which undoubtedly played an important role in choosing the location of the sites, shows that there is a direct relationship between the water resources and the location of the site, so that its small distance from the water sources has caused it to grow well in terms of dimensions. Milad is located near Kale-Shure in the center of the plain (Fig. 8) where many waterways and streams flow into it, the most important of which flowed a short distance from the site. This satellite has been able to facilitate access to water resources for agriculture and livelihood. The study of land use (Fig. 9) also shows that Milad is in a good agricultural position and probably suitable water sources have caused agriculture to be carried out by hydroponics in this area. Based on this, the location of the settlement surrounded by suitable pastures has provided the conditions for animal husbandry and livestock breeding for the livelihood of the population of the area. Based on the mentioned materials and in the general view, Milad Tape has created suitable conditions and platform for the use of agriculture in the region. On the other hand, the existence of pastures has provided the grounds for subsistence economy based on animal husbandry. 

Conclusion 
Due to the strategic location of access to water resources and the use of fertile soil, Milad Tape is one of the important sites and settlements in this area, along with other sites, especially Set Tape. By analyzing the cultural materials, a settlement sequence from the Yaz I period and its continuation to Yaz II and III was observed, which shows that it was of special importance in the Neyshabur plain and was efficient in drawing chronological horizons and presenting cultural components along with other sites. The few analyzes of the settlement pattern of Milad Tape also show that suitable water sources were available and the agricultural land was ready. This location selection pattern is also observed in Central Asia. Based on biological patterns, fertile soil, and agricultural use in the effective use of land in the Milad Tape area, it shows that there was a permanent settlement with a livelihood based on agriculture in its settlement area, which may have been three hills. The influence of the cultural characteristics of Central Asia and Yaz culture in Milad Tape, according to the typology of pottery, shows the influence and cultural interactions. 

Acknowledgments
We would like to gratitude and appreciation to the respected of the cultural heritage department chief of Neyshabur city, Mr. M. E., Etemadi, for his support in the field activity.

Abstract
In recent years Archaeologist have taken a special attention at south of Khorasan, especially the Qaen region. Recent archaeological surveys have provided valuable findings for researchers. Specific geographical location and the connection as a natural corridor among central Asia, North of Khorasan, southeast of Iran, and central plateau of Iran, which was made by central desert, can be a great cause in different periods, especially in the early second millennium B.C. The expansion of “GKC” (BMAC) in the Eastern half of Iran is one of the most important developments of the second millennium B.C. New findings show that this culture has spread to parts of South of Khorasan, for example, findings of the Razeh, Gavand and Bekanda previously studied. Sartakhteh Baraz site in Qaen is one of the significant sites in Southern Khorasan in which many evidences of the BMAC have been observed, which is less studied and, in this research, we attempt to introduce this site and identify the expansion of GKC. This site located in a mountainous region in Qaen area in North of Southern Khorasan. This site is much destroyed because it is located near a rural area. The main sources of this research have been chosen from the library sources and survey of Sartakhteh Baraz of Qaen area in 2016. The research method is descriptive-analytical. Then these findings were analyzed and interpreted in theoretical studies. This paper intends to introduce and describing BMAC at the South of Khorasan of Iran Based on evidence of Sartakhteh Baraz site of Qaen; furthermore, its results can demonstrate different aspects of this culture. It seems this culture has expanded in South of Khorasan in the first half of the second millennium B.C. 
Keywords: South of Khorasan, Qaen, GKC (BMAC), Sartakhteh Baraz Site.

Introduction
South Khorasan is located in the east of Iran from a geographical point of view. This region has received less attention in terms of archaeological studies than other regions of the Iranian Plateau. Although these studies have greatly increased in the last decade and have attracted some attention, they are still far from reaching favorable point. South Khorasan, or the current South Khorasan province, geologically has two deserts and mountainous parts. Qaen region, which includes more the mountainous part of the region, is considered one of the cold and rainy regions of the province, so that the average annual rainfall in the city is 180 mm. The pattern of placement of Qaen region is in the form of sometimes continuous mountain ranges in the direction of northwest to Southeast, where Baraz, shaskouh, Ahangaran and Qaen mountains are among the main mountain ranges in the region. Qaen, together with Sarayan and Ferdows covers the northern half of the province, and archaeologically, it is one of the richest areas of Southern Khorasan. Many important settlements of South Khorasan in different periods are scattered in this areas. Strategically, this region forms a link between North Khorasan and Central Asia with the central Plateau and even the southeast. This factor has made the basic and important issues of archaeology in different periods to be tied with archaeology studies in South Khorasan. The studies of BMAC culture in this area are important in the sense that specializes studies and surveys have not been done for this area, and most of the studies include surveys with the purpose of identification. The purpose of the current research is to identify and introduce new evidences is of BMAC culture and explain the spread of this culture in parts of South Khorasan. This research, by using the descriptive-analytical method as well as using field research based on the findings obtained from the archaeological surveys of the central part of Qaen city, tried to analyze and introduce the new evidences obtained from the BMAC culture in the South of Khorasan.
Research questions and Hypotheses: The most important question raised in this research is how to analyze the spread of Great Khorasan culture in South Khorasan? It seems that by identifying new evidences in South Khorasan region, it is possible to discuss this culture more precisely in this region in such a way that it is very likely that the Great Khorasan culture spread in this region in its final stages.

Discussion
The Great Khorasan culture refers to a collection of settlement sites of the late Bronze Age (simultaneous with the V and VI Bronze age) that was formed in a cultured range beyond political borders. This area includes parts of Southern Turkmenistan, Northern Afghanistan, Northeastern Iran, southwestern Tajikistan and Southern Uzbekistan. Among the prominent features of this culture are the presence of distinctive types of pottery, the abundant use of bronze metal and precious metals such as gold and silver, the presence of a variety of prestigious and everyday goods that are made of imported and local stones, including: turquoise, agate, chlorite and marble. In addition to that, collections of unique and possibly ritual objects such as scepters of power, miniature columns, stone weights, mixed stone figurines of seated women in woolen clothes, marble vessels and collections of silver and gold vessels with special reliefs, all it shows specialized industry and exchange economy in this culture (Vahdati, 2015:42-43). 
  In general, the beginning of archaeological activities in the area of GKC (BMAC) in the central east of Iran in recent years, has led to the identification of new settlements and cemeteries of this culture. The new archaeological data and documents obtained from the settlements in the northeast and east of Iran (Khorasan) show the new areas of expansion and influence of GKC. The site of Sartakhteh Baraz of Qaen is one of the most important sites in South Khorasan, where the evidences of GKC has been observed. Sartakhteh Baraz site was first identified during archaeological investigation by Gholinezhad (Gholinezhad, 2016). This area includes large mound with an area of approximately 120×300 meters, which, due to agricultural activities, cultural data are removed from the original context and placed on the slopes and lands prepared for agriculture (fig 2). Therefore, the distribution of cultural materials can be seen on a large scale. The surveys conducted show that the data and evidence obtained include pottery (fig 4), dagger (fig 5), and a wand head (fig 6) vessel of kohl with a rod (fig 7). The pottery data in the area includes samples that belong to the third to second millennium BC according to the forms and types of pottery (Anani 1400: 113). Among these, there are 6 pieces related to the BMAC culture except for the two pieces that have pea paste and cover, the other pieces have orange paste and cover (Table 1). Some of these pottery are very similar to examples of the final stages of the BMAC culture such as Bustan and Molali in the first half of the second millennium BC (Ionesov, 2002). Based on this, it can be concluded that the layers of the BMAC culture in this area belong to the final stage of this culture. In addition to these, bronze tools and artifacts have been found in abundance in the graves related to the BMAC culture with we witness in the prominent sites of this culture such as Gonur Depe (Sarianidi, 2007:90-93).

Conclusion
In recent years the expansion of archaeological activities and surveys in South Khorasan has increased the identification of settlements and sites of different periods. However we are still far from the desired point and it is necessary that many areas of South Khorasan be investigated systematically and of course specialized. During the surveys, 4 sites belonging to the Great Khorasan culture have been identified in the South of Khorasan. However, if we consider Gonabad as part of this region regardless of the current political boundaries, the number of sites will increase. The new findings obtained from the Sartakhteh Baraz site in the Qaen region show the importance of this region in the late Bronze Age. As mentioned in this research, these findings belong to a new culture that appears in this region. The Great Khorasan culture has spread over a wide area from Central Asia to the Iranian plateau. In the meantime, South Khorasan has acted as a communication route and passage. In such a way that it connects the north-east and south of Turkmenistan to the south-east and the center of the Iranian plateau. Accordingly, it is obvious that we are facing the remains of this culture in this region. But the important question raised here is why most of the areas obtained in this region are cemeteries? Although the answer to this question is not the goal of the present study, before answering this question, it should be noted that all these sites have been archaeologically investigated and none of them have been stratified. The sites that have been explored have only been speculated and demarcated. However during these speculations, it has been almost determined that some of these areas are cemeteries. In the meantime, considering the difference that Sartakhte Baraz site has with other contemporaneous sites and has evidence from earlier periods, it creates the possibility that we may be facing a settlement here. Accordingly, in order to reach a reasonable answer, it is necessary to carry out a stratigraphy excavation in this area in order to be able to answer this question and of course many questions related to this culture in South Khorasan. Another important point that was mentioned and raised as a hypothesis is that the settlements in South Khorasan probably belong to the final stages (first half of the second millennium BC) of the GKC. of course, this assumption also needs more studies in the entire eastern region of Iran. It is hoped that more ambiguities can be answered in the future.

The historical fortress of Aq-Qalih, a large and little-known structure in the Juvayn Plain of northern Khorasan, is tentatively attributed to the Mongol Ilkhanid period based on limited prior studies. However, extant Ilkhanid -period documents offer no confirmation of its existence. Therefore, the hypothesis of Ilkhanid construction relies solely on archaeological evidence and the dated inscription of the Aq-Qalih Mosque. This research seeks to establish the significance of Aq-Qalih as a midway settlement along Ilkhanid travel routes in northern Khorasan, utilizing historical documents and GIS analysis. Further, by comparing Aq-Qalih’s structure with contemporaneous structures in Mongol-influenced regions of China and Iran, this study assesses the hypothesis of Ilkhanid construction. The findings indicate Aq-Qalih’s strategic location along major Ilkhanid travel routes, with the Ilkhans’ and their successors’ annual visits increasing the likelihood of a midway settlement. Moreover, structural comparisons with Chinese examples like Shangdu, Daidu, and Yingchang, as well as Sultaniyya in Iran, reveal significant similarities, bolstering the hypothesis of Ilkhanid-era construction.