Abstract
According to historical and archaeological sources, the ancient city of Esfarayen was one of the important settlement centers of the Islamic era. During its existence and prosperity, this city was a link between the two famous and big cities of Nishapur and Jurjan, but from the end of the Safavid period onwards, due to various reasons, it declined and its inhabitants gradually moved to the new city. So far, parts of the ancient city of Esfarayen have been excavated by archaeologists during several different seasons. In the meantime, choosing a suitable place for archaeological excavations in this area has always been one of the most important issues for its explorers, because due to the limitation of financial resources and the large area of the area, it was necessary to determine suitable places for excavation in advance. so that its archaeological exploration can be done with more certainty. For this purpose, at the beginning of the third season of excavations, six hectares of the city were investigated with the help of magnetometric method. Then, based on the results of magnetometry, the excavations of this season were carried out. According to these explanations, the main goal of the current research is to present the results of magnetometry and compare it with the findings of the archaeological exploration of the ancient city of Esfarayen. In the current research, the descriptive-analytical method has been used using the results of field and library studies. As a result of these studies, many evidences of industrial activities were identified in the site, including architectural remains of a pottery kiln and many evidences of pottery production, which are important in the archaeological studies of the Islamic era.
Keywords: Magnetometry, The Ancient city of Esfarayen (Balqis), Esfarayen.

Introduction
The ancient city of Esfarayen, which today is known as the city of Belqis, is located in a vast plain, three kilometers southwest of Esfarayen, with an area of nearly 200 hectares. Currently, this city consists of different parts such as Arg, Sharistan, Rabz, Hesar and Khandaq. According to the documents obtained in the archaeological excavations, the city of Balqis had a settlement from the first centuries of the Islamic era to the beginning of the Qajar period (Vahdati and Nik-Govtar, 2016: 98). Due to the importance of this city in the past, several seasons of archaeological excavations have been carried out in it (Vahdati, 2016, Vahdati and Nik-Govtar, 2018 A and B, Farjami and Sotoudeh, 2019). But Balqis has a large area and the excavations that have been carried out so far do not even cover a small part of the city. For this reason, it was necessary to use remote sensing methods to identify at least a significant part of the city’s landscape and buried bodies. One of these methods, which is considered one of the branches of geophysics, is magnetometry. According to these cases, in 2009, and with the aim of identifying part of the layers buried under the soil and choosing better places for exploration, first a part of the area was surveyed for magnetometry (Aminpour, 2010). In this investigation, about six hectares of the area in a place called Tepe-Minar and also the northern part around the citadel in the southwest side of the city were surveyed by geomagnetism. By carrying out this investigation, results were obtained, based on which the third season of archaeological excavations of the site was carried out. According to the aforementioned, the main purpose of the current research is to investigate and analyze the results of the magnetometric survey of the area and the exploration that was carried out based on it. The most important question that we are trying to answer in this research is to determine the effect of the magnetometric method on choosing a better place for the purposeful exploration of the Balqis area. The method and approach of the current research is descriptive-analytical, and the method of gathering information is based on field studies from magnetometry and archeological excavations of the site, as well as library studies.

Discussion
A- The area known as Tepe Manar The results of magnetometry survey: This section included 36 grids of 10 x 10 meters. In some parts of this section, confused and jumbled magnetic anomalies were recorded, which probably indicate the transformation and destruction of its subsurface artifacts. But in other parts, the magnetic gradient anomaly map showed evidence of architectural structures and other buried ancient phenomena. Accordingly, in the part marked with the letter F, anomalies were revealed that could be related to heated masses such as brick structures or terracotta masses. The results of archaeological excavations: In order to measure the investigated parts of Tepe Manar with magnetometric method, three test boreholes were dug in the discussed area. In the first borehole, all the piles of clay and ash were encountered. In the second borehole, layers were identified, the surface and subsurface layers are sand, sand and soil, respectively, and there is a mixture of ash and soil in the lower layers. Inside the texture of soil and ash, a large amount of welding furnace and pottery was obtained. Borehole No. 3 also did not find any architectural works and only a pile of clay and ash was identified in a hole. B- The north-eastern area of the citadel the results of the magnetometric survey: In the magnetometric survey of this part of the city, several anomalies were identified. In this range, anomalies have been revealed in the form of light-colored extensions and in some cases perpendicular to each other, which can be related to the buried clay architectural structure. The results of archaeological excavations: In the scope of the second part of the geophysical survey, three boreholes and trenches were opened and explored. Borehole number one hit a pile of glazed pottery from the 6th century AH. It seemed that there was a pottery workshop around this place, because most of these pots were covered by the wastes from the pottery activity. For this purpose, a trench was excavated near borehole 1, measuring 6 x 6 meters. After removing the surface layer, a pile of pottery shards and pottery kiln debris was encountered, which were scattered on the surface of the trench at different depths. For this purpose, another borehole with dimensions of 2 x 2 meters was created at a distance in the southern part of trench 2, and after removing the surface layers at a depth of 30 cm, the remains of a pottery kiln were identified. The reason for the large amount of strong magnetic anomalies in this area is the presence of many pottery pits in this area, in addition to the pottery kiln. The date that can be determined based on the pottery obtained from this kiln is the second half of the 12th century A.D.

Conclusion
Today, in the world, magnetometry is widely used by archaeologists to identify architectural structures and buried structures. By using these methods, it is possible to examine and study many parts of an ancient site without destruction in a limited time. For this reason, in the archeology project of the old city of Esfarayen, the magnetometric method was also used during a period. Because not only the area was large, but also the limitation of resources prevented it from being able to explore a large part of it. About six hectares of the area were studied in the magnetometric survey of the area, which was carried out with the Fluxgate device. After investigating and preparing the related map, anomalies were observed in some parts of the map, which were probably related to industrial activities. Based on these anomalies, six boreholes and trenches were dug in two parts of the area to measure the results of the magnetometric survey. In almost all boreholes and trenches obtained from the excavation, evidences of industrial activities such as pottery production or pits of potter’s pits were identified. The existence of these convincing evidences is a clear proof of the magnetometric anomalies of the area. In a trench, very clear evidence of an Islamic era pottery kiln was found, around which there were several waste places. Considering these cases, it can be said that the results of the archaeological excavations of this site are a confirmation of its magnetometry project. If these studies continue and boreholes or trenches are created in other parts, we can gain more knowledge about the different spaces of the ancient city of Esfarayen.

Abstract
Belqeis site or Old Esfarayen is considered one of the important urban centers in the Islamic era and in the North Khorasan province. Based on historical sources and archaeological excavations, this city has been inhabited since the early Islamic centuries until the Safavid period. So far, many books and articles have been published about this city and some of its archaeological evidence; But parts of its findings have not been published yet. Pottery from the 11th to the 14th century is among the archeological findings of this site, which have not been introduced and investigated in any independent research. These works include various decorative groups, some of which are less known. These factors show the necessity of conducting independent research in this field. The current research was based on two essential and main questions, which are as follows: How many groups were the pottery from the 11th to 14th centuries, what decorative features do they have, and which regions are they comparable to? What are the production centers of this pottery? According to these questions, the main goal of the current research is to investigate, analyze, and compare the pottery of the 11th to 14th centuries in the vicinity of the Belqeis site and to identify their possible production center or centers. The descriptive-analytical method was used to conduct the present research and the method of collecting information is based on field and library studies. As a result of the present research, various types of unglazed and glazed pottery from the 11th to 14th centuries of the area were investigated, described, and compared. In the meantime, some decorative techniques such as drop-drop glazing were also presented in the research for the first time. Much of the studied pottery was probably produced on the site itself, whose production evidence was also shown in the article. Still, some pottery, such as lusterware and celadon, was probably exported to this city from other centers such as Jurjan, Jiroft, Kashan and China.
Keywords: Pottery, Esfarayen, Belqeis Site, 11th to 14th Century, Islamic Era.

Introduction
Esfarayen is one of the ancient cities of North Khorasan province, which has been subject to calamities, looting, and attacks many times throughout history. Historians have called Esfarayen the border of Nishapur or Jurjan. Most of the transformations of this city are related to the 9 to 11 centuries; However, in the period of 12th and 13th centuries, it faced decline and was attacked twice by the Ghoz and then by the Mongols. In the 14 century and with the establishment of Sarbedars rule in the region, the city became relatively prosperous for a while, and this process continued until the Safavid period. According to these cases, it is clear that the life of the ancient city of Esfarayen continued continuously from the beginning of Islam to the Safavid period; This is despite the fact that our awareness regarding the archaeological findings of this city, especially its pottery, includes most of the early Islamic centuries. On the other hand, our knowledge about the pottery of the Islamic era of Greater Khorasan also includes the periods before the Mongol attack and after the Timurids came to power; While our knowledge about the pottery of the 13-14 centuries in the region is relatively small. Considering that the social life of the city of Esfarayen spanned the entire 11th to 14th centuries, it was necessary to investigate the pottery of this period in independent research. A subject that has not been independently addressed in any research so far. According to these cases, the current research is based on two essential and main questions, which are as follows: How many groups were the pottery from the 11th to 14th centuries, what decorative features do they have and which regions are they comparable to? What are the production centers of this pottery? According to these questions, the main goal of the current research is to investigate, analyze, and compare the pottery of the 11th to 14th centuries at the Belqeis site and identify their possible production center or centers.
Descriptive-analytical method was used to conduct the present research and the method of collecting information is based on field and library studies. Based on this, the pottery studied in this article is related to the archaeological excavations of the third and fourth seasons of the Belqeis site. After the initial documentation and description of these pottery, they have been classified and their comparative study with other sites has been done.

Discussion
In the present study, only the pottery was examined and studied, which included the 11th to 14th centuries according to the comparative dates. These potteries were divided into two groups, unglazed and glazed, and each group was examined separately. The unglazed pottery of the area has a clay paste in the color range of pea, red, green, and black, and various motifs are used on some pieces. Some unglazed pottery from the area, such as red paste samples, probably from Jurjan or Jiroft, were exported to this area. But other decorative pottery, such as molded and stamped samples, were produced in the area itself.
The glazed pottery of the area also has various clay pastes, frit-ware, and porcelain. The single-colored glazed examples of the area generally have a frit paste, and most of them are turquoise-green in color. Most of these production pieces were probably from the Belqis site. Among the single-colored glazed pottery of the area, scattered pieces of Celadon pottery were also identified, which imported from China in the 14th century. Pottery with the underglaze painting technique has a lot of variety and is generally frit-ware. Some of this pottery, such as the blue and white samples, was probably the production of the area itself, but the pottery, such as the Silhouette and Sultanabad samples, was exported to this area from other centers such as Jurjan, Nishapur, and Kashan. have been Lusterware pottery, which all belong to the 13th century, are exported from other regions such as Jurjan or Kashan.
It should be noted that in the excavations of the site, in addition to the pottery kiln, many slags were also found inside the kiln and its surrounding areas. Among the evidence of pottery production in the area, we can mention the following: scattered pieces of clay molds, three, four, or multi-faceted clay stamps, and many pieces of clay balls that sometimes have glazes on them. It can be seen, many pieces of pottery tripods, clay chines, unglazed or glazed pottery, deformed or stuck together, crudely carved pottery, and objects Cone-shaped pottery that was obtained along with other findings related to pottery production.
According to the existence of this solid evidence as well as petrographic studies conducted on some terracotta pieces, it can be assumed that many of the studied terracotta pieces were produced in the area itself; But some pieces, such as examples of lusterware, Celadon, Sultanabad, and some painted red paste pottery, were imported from other centers such as Jurjan, Nishapur, Jiroft, Kashan, and China.

Conclusion
The present research was carried out with the aim of examining, comparing, and dating the pottery of the 11th to 14th centuries of the Belqeis site and also identifying the possible centers or centers of their production. As a result of the present research, various types of unglazed pottery of this period were investigated, analyzed, and compared. As an example, pottery with drop glaze decoration was introduced and it was checked that this decorative method was used in combination with other motifs on the unglazed pottery of the area. Due to the fact that in addition to unglazed pottery, evidence of pottery production was also obtained in the excavations of the area, it can be said that most of the unglazed samples were probably produced in the area itself; But pottery such as unglazed embossed red paste with stumpy decoration and sphero-conical vessel pieces were probably exported to this area from the two centers of Jurjan and Jiroft. Because the production evidence of this pottery was obtained in these two centers and the form and patterns of the pottery in the area are somewhat similar to the production samples of these two centers.
Many of the glazed pottery of the middle Islamic ages of the area, despite the great variety, were probably produced in the area itself; As an example, we can refer to the single-color turquoise glazed pottery of ferritic paste, the examples of single-color oil-lamps of frit-ware, and the blue and white pottery with a striped pattern. Apart from these cases, in the excavations of the area, scattered fragments of other pottery groups of this time period were found, which were probably imported from other centers due to less dispersion and lack of identification of proof of their production in the area. are as an example, we can mention the obtained luster-ware, Sultan-Abad, Celadon, and Silhouette pottery, which may have been imported from centers such as Kashan, Jurjan, and Nishapur.

Abstract
The historical city of Esfarayen is one of the most important and glorious cities of the Islamic period, which was one of the important provinces of Neishapur until the Mongol invasion, and shortly after the Mongol invasion and the destruction of Neishapur, it was revived and flourished more than before when the Ilkhanids came to power. At the beginning of Timur’s rule, this city was severely destroyed, and from the end of Timur’s period to the end of Shah Abbas Safaviy’s rule, it grew relatively slowly with political ups and downs, and it was abandoned due to the attack of Afghans and population changes. One of the most important valuable goods that was exported from China to other regions from the third to the twelfth century A.H. is Celadon pottery and the other is blue-white pottery. According to the 9 seasons of archaeological exploration in Shahr-e Belqays, 5 pieces of celadon and 2 pieces of blue-white pottery have been found, which have not been studied so far, and for this reason, research was necessary. The main questions of this research are, first of all, what period do these celadons and blue-and-white porcelain belong to? Secondly, according to the technical structure and typological comparison, are the pottery produced locally or extra-regionally, and how did it enter the city of Esfarayen? The third question is the reason for the presence of this type of pottery in the historical city of Esfarayen based on the archaeological context and historical documents. The descriptive-analytical research method and data collection method is based on field and library studies. The results showed that the celadons belong to the 2nd to the 8th century A.H. and the blue-and-white pottery are dated to the beginning of the 8th to the 11th century. The celadons and blue-whites studied are completely non-native and entered the city of Esfarayen by sea and land. Due to the quality and rarity, the type of motifs and the type of lines and writing themes are related to the noble and wealthy classes of the city.
Keywords: Shahr-e Belqays, Esfarayen, Islamic Period, Chinese Pottery, Ming Dynasty.

Introduction
Due to the strategic position of the land of Iran, which has always been on the path of important East-West communication routes from the past to the present, with a branch of the Silk Road passing through its soil as an intermediary between the civilizations of the Far East, especially China and Its western neighbors were like Iraq and Syria. Among the goods exported from China are the famous Celadon pottery and blue-and-white pottery. Due to the importance of Celadon and blue-and-white pottery, many countries were competing with each other based on their geographical region at that time to take over the market for the products of this art and industry. China was the main manufacturer of this product and Iran was the main highway for the commercial connection of this product to Europe and Africa. The city of Esfarayen is one of the important cities of the Islamic period, which was located on the commercial route of the Silk Road (Moghdisi, 1982: 566); (Ibn-e Howqal, 1986: 188; Jihani, 1988: 149); (Ibn-e Khurdazbah, 1991: 222). Due to the presence of powerful rulers and politicians such as Abu al-Abbas Esfarayeni in the Samanid and Ghaznavid periods, in the Seljuq and Ilkhanid periods such as Saeed Malik Bahauddin Juvini and in the Safavid period, Abu Muslim Khan enjoyed special growth and development and is one of the most prosperous and prosperous cities. Khorasan was considered that the commercial highways passed through this city (Aubin, 1971:121). In addition to crossing the trade route, the existence of thriving markets (Idrisi, 1409 AH, Vol. 2: 690-693)، (Hamiri, 1984: 56), and the production of important goods such as: cloth, metal containers, pottery, makes merchants and In addition to supplying goods imported from far away to this city, merchants should distribute the goods produced in this city to nearby cities and distant places, especially the Iranian plateau, Shamat, Anatolian Peninsula, North Africa, etc. One of the most important imported goods and popular among the governors and residents of this city is the dishes known as Celadon and Blue White, of which 5 pieces of such dishes have been discovered in archaeological excavations (Nikgoftar, 2014). Considering the discovery of this pottery from the archaeological context and the lack of introduction and study of it, and from the mention of writing marks on their surface, the upcoming article tries to analyze them in the context of history and archeology in addition to introducing and reading the lines.
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Discussion and reasoning
 In the archaeological excavations of the city of Esfarayen, a total of 4 pieces of celadon pottery were found, one of which is of the Yue type (3rd-4th century) and the rest is of the Lank Chuan type (6th and 7th century). By examining and comparing these types of pottery, it can be said that in addition to neighboring areas and extra-regional areas, there has been direct or indirect trade with China since the 3rd century, considering the increase in the number of Lankchuan pottery related to the 6th century. And seventhly, from the reference of historical documents about the rule of the Jovini family over this city, their good relations with the Genghis family and the handing over of the government of the western part of Khorasan to this family (Jovini, 2012, vol.2, 222) and the political-economic journey of this family to Mongolia (ibid.: 222) and from the discovery of coins from this period in neighboring regions (Nikgoftar & Behnamfar, 2008) and extra-regional (ТЮНИБЕКЯАН, 2003) it can be said that in this period, Lank Chuan pottery came through the trade route of the Silk Road. That Esfarayen was located in one of these important commercial branches (Maghdisi, 1982: 566); (Ibn-e Howqal, 1986: 188; Jihani, 1988: 149); (Ibn-e Khurdazbah, 1991: 222) entered this city. Among other pottery that can be seen in China and Islamic lands in a significant way after Celadon is blue-and-white pottery, the production of these vessels became common in the states of Jijiang, Jianshui, Yusi and Jiangshan from the Yuan Dynasty, but the best type In the Jindjin states in the city of Chin Khwa (Chin-Hwa), which was related to the imperial furnaces (Bahranipour, 2022: 8). In the archaeological excavations in Shahr-e Belqays, 2 pieces of blue-and-white  pottery were identified, which according to the decorations and technical structure belong to the late Timurid and Safavid periods and the Ming period in China. It has been stated that according to the reference of historical documents and archaeological data mentioned above about the importance, value and use of these vessels and from the motifs and lines used and the examination of the technical structure of the vessels which proves that they are non-native, in general, it can be He said that these dishes were made for the order or use of the rich class and nobles in this city.

Conclusion 
By studying the piece of Chinese pottery in the city of Esfarayen, so far, two prominent pottery types of Celadan and blue-and-white  have been obtained, the first group of Celadan; that by comparative comparison of this species in terms of technical structure such as; The type of paste, glaze and construction form with examples of ceramics obtained from the sites of the Islamic period such as; Siraf, Mehruban, Kish, Neishapur, and Bandar Najiram, it can be said that this type of celadan is imported and non-native, and in terms of chronology, it is similar to the Yue and Lank Chuan types at the same time as the Samanian period until the end of the Ilkhanate period. The increase in the number of Lankchuan type of celadan along with other archaeological evidence and historical documents prove the prosperity and prosperity of this city in the Ilkhanid period and a transregional and global trade connection. Among the other types of pottery that were mentioned are blue-and-white  pottery, according to the comparative studies and examination of their technical structure, this type is also imported, according to the references in the historical documents about the destruction of this city in the attack of Timur and its lack of prosperity. It can be said that the presence of this type of pottery in this city dates back to the late Timurid period and the early Safavid period, during which time this city prospered again. According to the taxonomic examination and comparison of the pottery, which is completely similar to the pottery discovered in Hormuz, Taiwan, and the samples obtained from North Africa, it can be said that probably these pottery were indirectly and transregionally and globally from China to the port of Hormuz. And through the south-north highway and through the Jerjan-Tos commercial road, which was restored and reconstructed by Amir Ali Shir Navai in this period, he entered the city of Safrayan. Due to the rarity, quality of construction, themes and motifs, and on the one hand, historical documents indicate that these dishes were used in royal banquets or royal tombs, and from the discovery of these pieces from the citadel and noble houses, it can be said that these dishes are unique to The privileged and prosperous classes belonged to the historical city of Esfarayen. In general, the Chinese writings in the blue-and-white earthenware of Esfarayen city are as follows: the text of container number 9, the writing on the bottom of the container is incomplete and illegible, and the text on the bottom of the container contains the Chinese word called (peace, comfort), (longevity), (happiness) and (health). The text of container number 13 is written with the comparison and typology of the Chinese word du-ming-nlen-zuo, meaning the construction of the Ming period.