Abstract
Tuyserkan plain is one of the middy mountain and highland plains in Alvand Range, strategically one of the most important connector plains of western Iran and throughout history, especially the Islamic period, the path of the great Khorasan has been of considerable importance. This plain has been studied and identified during the winter of 2012. This study has been studied at random by collecting cultural material from the area of the site in order to identify and record ancient sites and monuments. The results of the study include 44 sites from the copper and stone Age to the late Islamic period, and according to the identified surface artifacts 14 of these sites have artifacts from different Islamic times, this area has shown importance in the Islamic era but so far the plain has not been explored in terms of the cultural developments of the Islamic settlements. The question now is, what are the characteristics of Islamic period in Tuyserkan plain and what is their pattern of distribution and expansion, and in what periods has it grown and expanded? The main purpose of the research is to study the archaeology of the Tuyserkan plain with the typology of cultural changes in the works and settlements of the Islamic periods and it is an appropriate pattern of distribution in the Tuyserkan plain. The research method utilizes spatial analysis and field and library, analysis of cultural works and materials collected from archaeological survey and study of Islamic settlements of Tuyserkan plain, it will be based on current theories of settlement patterns and archaeological landscape. The results show that the settlements of Islamic period of this plain are distributed in all parts of the plain, consisting of large enclosures as the main dwelling cores and small enclosures formed as small bases dependent on roads and arable land, in the Safavid period, the Tuyserkan plain also witnessed a growing number of settlements with the Carvansara and Bridge Farasfaj  being one of the most significant monuments of that period, and finally in the Zandieh and Qajar period expanding population and settlement. 
Keywords: Archaeology Study, Tuyserkan, Islamic Period, Archaeology Aspect.

Introduction
One of the most fundamental archaeological studies (archaeology surveys) to identify and deter mine the location of archaeological sites and settlement characteristics. Archaeological surveys are carried out to find out general information about settlement developments in different areas. This is a forerunner to archaeological excavation, which in fact means reconstructing and accurately identifying communities and their cultural achievements, archaeological studies are an important step in the analytical programs of the historical evolution of human societies and the selection of index sites for exploration. Based on the above, the Tuyserkan plain has been investigated and identified during the winter 2012. This study was conducted in a randomized manner by collecting cultural material from the enclosures at random to identify and record ancient sites and monuments stone age and copper period, and identified by surface artifacts, there are 14 sites from various Islamic periods that indicate the importance of this area in this period. Prior to this research, the Islamic period sites of Tuyserkan plain were not explored and it was necessary to study them. The lack of studies of Islamic settlements in the Tuysrkan plain provides the motivation for studying and comparing population- based settlements as well as their relevance to ancient habitats.

Identified Traces 
There are various definitions for the concept of landscape but all of these definitions are in common sense, and they include the structures created by humans between their own space and their natural structure. Obviously, human tissues in different societies are made in accordance with their environment. Many of today’s concepts and meanings of landscape come from the writings of German geographer otto schuler written in the early 20th century. He believes that geographical studies should be dedicated to the visible landscape. Human societies and natural geography are the two major factors that make up the Archaeological landscape structure. Since two- thirds of the world’s vegetation is made up of fields, pastures and artificial forests, one can understand the crucial role of humans in creating landscapes. Human societies are constantly changing and experiencing space throughout their lives, and the place is always confronted with the effects of human behavior. Tuserkan is a subsidiary city of Hamedan province with one area of about 1480 sq. K. M. Which covers 7.7.7. Of the area of Hamedan province. As we know in the year 21AH when the war of Nahavand occurred and led to the defeat of the Iranians against the Arabs, all areas of Hamedan including Tuserkan were captured. On the urban situation and the situation of the people in the Tuy and Serkan from the seventh to the tenth century AH there is no precise information, but since the tenth century, the rise of the Safavid dynasty, your village is known as Tuserkan while the Serkan remained with its old name.
Of course, there are no credible sources to show exactly what date Tuy name was converted to Tuserkan and the reason that the possibility of renaming this name whit the Safavid period should be known is that there are books related to this period that their authors have the reputation of Tyserkan while none of the works before the Safavid era have the reputation of Tuserkan. The few people in this place who are mentioned in some of the Safavid works are known as Tuyi and this shows that at first this village was famous under the same name as Tuyi.

Conclusion
 By studying Tuyserkan plain, 14 sites have been identified from different periods of the early Islamic to the later ages. Environmental factors have played an important role in the process of formation and expansion of these sites, factors such as height, suitable soil, access to communication, access to water resources and access to range lands. Most of this sites in this period were formed in lowland and mid- mountain and fertile lands in susceptible grassland areas. The impact of cultural and human factors on the pattern of settlement in Tuyserkan plain has not been affected. The peak of the flourishing and growing of settlements dates back to the early and middle centuries of Islam and its decline in later Islamic times. In recent centuries the number of sites has diminished and never reaches the boom of the early and middle ages. The reason for this was the growth of population in the main sites and surrounding areas, which have become large cities and villages today, and their lives continue. The results show that the settlements of the Islamic period of Tuyserkan plain are distributed in all parts of plain, consisting of large sites as the main center of settlement and small sites as bases of roads and arable land.

Abstract
Despite the importance, position and high role of the city of Hamadan in the political, economic, social and cultural developments of Iran during the Qajar era, targeted studies that determine the spatial organization and social structure of this city during that period have not been carried out, and there are many questions regarding the nature of the changes in the context. Its history remains unanswered. The current research seeks to answer questions about the transformation and development of the spatial structure of Hamedan city during the Qajar era by relying on written sources, architectural works and archaeological evidence. In order to achieve this goal, while using all the written sources related to this city in the mentioned period, the changes of the urban context and the structural characteristics of its spaces were determined and the factors affecting the growth and development of the city were determined during this period. The result of the research made it clear that due to its ancient background, special geographical location, benefiting from suitable environmental capabilities such as abundant water resources, and also due to its location on the path of important trade-pilgrimage routes in the Qajar period, Hamedan was one of the cities with social and economic importance and status. It has gained merit and accommodates a relatively large population and has attracted the attention of various social groups, especially merchants. Thus, suitable conditions have been created for the construction and discovery of numerous architectural works and monuments with different functions (defense facilities, residential neighborhoods, squares and plazas, markets and caravanserais, mosques, schools, baths, churches, etc.) and the urban space, especially in aspects The south and southeast have developed and expanded significantly.
Keywords: Iranian Cities, Qajar Era Cities, Historical Context of Hamadan, Spatial Structure, Written Sources.

Introduction
Cities are one of the main centers of the emergence of civilization and valuable cultural treasures, without knowing them, it is not possible to study the history of various developments in human life. For this purpose, the study of the cities left from the past plays a significant role in understanding the political, administrative, social, economic and cultural structure of the societies that created them (Krimian, 2014: 121-111) and can provide clear horizons in recognizing the physical, social and cultural structures And reopen the past civilizations to researchers (Krimian and Seyedin, 2009: 69). The study of the ancient living spaces of Iran and the historical contexts of the cities is a necessity that has allocated a part of the scientific activities of archaeologists. Although the historical fabric of Hamedan has suffered a lot of damage due to various reasons, including indiscriminate and irregular constructions, but a number of its historical and valuable buildings have survived the ravages of various times and manipulations. Recovered and recognized to a great extent. Hamadan is one of the few historical and ancient cities in the country that has survived historical developments with strength and has preserved its historical context to some extent. Undoubtedly, Hamedan’s location on the path of communication routes in different eras, as well as its special geographical location and the benefit of environmental capabilities are the main reasons for the continuity of this city throughout history. Fortunately, valuable elements of the architecture of the Qajar era have survived in this city, and by studying them, it is possible to analyze and restore the spatial structure of Hamadan city to a great extent.
The purpose of the Research: The main purpose of the research, the results of which are presented in this article, is to find out how the physical structure and spatial organization of Hamadan was created, developed and transformed by relying on architectural works, archaeological evidence, written sources and visual documents left from the Qajar period.
Research Questions: In this study, we have attempted to answer questions about space structure, different types of architectural works, scope and physical realm, as well as the extent to which different social groups have been influenced by the space organization and architectural works of Hamadan in the Qajar era.
Research Method: The study presented in this article is historical -analytical in nature and content, and has been conducted in both field and library methods.
The original text of the previous article consists of several different sections. In the discussion of the research background, the most important studies on the historical context of Hamadan have been emphasized with the emphasis on the Qajar era. In the context of the structural characteristics of the Iranian cities in the Qajar era, the main characteristics and components of the identity of Iranian cities in the Qajar period as well as how the structural characteristics of Iranian cities from the Safavid era to Qajar has been discussed. The next section of the article is analyzed and explained by the Qajar Space Organization in the Qajar era based on written sources. Travelogues and historical texts from the Qajar era have formed the most important study sources in this section. In the other section, the urban spaces of Hamadan during the Qajar period are discussed. In this section, relying on written sources and existing architectural evidence, some of the most important physical and historical spaces recovered by the Qajar era of Hamadan, including defense facilities, residential neighborhoods, inter -and -outskirts, squares and squares, commercial spaces and markets And the disposal of sewage, mosques, baths, churches, and so on. It was also known that marketers and traders were more involved in the phenomenon of the city’s architectural works in the Qajar era than other social groups.

Conclusion
In the present article, it was attempted to find out what the space structure of Hamadan had in the Qajar period by relying on the written sources and existing architectural works. With what was done, it turned out that the city was forming from three internal (city center), middle (urban areas and neighborhoods) and exterior (fence and suburbs). Hamadan Space Agency is also influenced by the pattern of Islamic cities of Iran, has a citadel (government, bureaucratic and administrative headquarters), Jame Mosque (Religious Center) and Market (Economic Heart) and other urban elements (schools, blessed shrines, intra city caravans, baths And ...) Somehow they were related to these three. Relying on written documents, it can be said that areas outside the city’s defense walls were exploited for agriculture and horticulture. During the Qajar period of Hamedan, with the center of the mosque and the bazaar in the south and southeast direction, it expanded and some new neighborhoods, along with urban elements such as mosques, baths, etc., are being constructed in this area. Most of the reasons for the expansion of the city’s texture in this area can be considered as the proper slope of the land and the lack of natural effects that could have been a barrier to construction. Due to the flow of the four rivers inside and outside the city during the Qajar period and their annual floods that occur as a result of heavy and long -term rainfall, as well as the slope of the city in the south -north, as a result of the flooding of the northern parts, as well as the natural complication. The so -called Mosalla hill in the eastern part, which prevented the development of the city’s physical structure, was the best way to develop it, southern and southeast side, along the rivers in the inner -city rivers of al -Wawsger and Davin. According to written and illustrated documents as well as existing architectural works and archaeological evidence, it can be said that the city of Hamedan in the Qajar period from the north to the Goulan Heights, Nazarbaig and Shalabafan, from the east to the neighborhoods of Imamzadeh Yahya and Zandis, from the West to the Bonehbazar and Sabadbafan neighborhoods were confined to the Kolapa, Doroudabad and Doguran neighborhoods from the south. Also, the result of studies on the role and influence of different social groups and classes in the formation of Qajar architectural works of Hamadan indicated that the traders and marketers of the marketers top the list of builders and sponsors of various buildings (religious, commercial, residential and public).