Abstract
The longevity of some local dynasties has led to the formation of significant settlements in different environmental contexts, including mountainous to forested areas of northern Iran. Kohneh Gorab located in North the Amlash This area was one of the inhabited areas during the reign of Al-e Kia in the east of the Gilan Province is one of the notable examples in this field. Recognition and analysis of the ancient location and communication of Kohneh Gorab as one of the settlements under the political-cultural control of the Al-e Kia family in the Gilan has necessitated the forthcoming research. The present study seeks to answer the following question: According to the cultural findings (tiles and pottery) of the ancient site of the Kohneh Gorab of the Amlash from the perspective of relative chronology and concerning related historical texts, what period can be for this site suggested? And how can the intra- and extra-regional connection of the old the Kohneh Gorab site with the surrounding areas be explained? The most important purpose of the study is a chronological explanation as well as the study of intra- and extra-regional cultural relations based on defined cultural data. The method of data collection is field-documentary and the research method is descriptive-analytical. The result is that the most important cultural finds of the Kohneh Gorab area, including pieces of tiles with monochromatic glazes and plant motifs, as well as plain pottery with carvings, Slip-Painted, glazed pottery with the monochromatic glazes, the underglaze engravers, the sprinkled glazes, the blue-white paints, the Sgraffiato paints, undergrowth paintings, indicates a cultural connection with its neighboring areas such as the Panjpiran Tepe of the Lahijan, Islamic city of the Gaskar, the Lisar Qaleh of the Talesh (intra-regional) and also indicates relations with landmarks such as the Amol, the Jorjan, the Neyshabur, the Rey and the Saveh (extra-regional). A comparative and comparative chronology of this area showed that the settlement began at least from the 3rd or 4th century AH and continued until the 8th to 10th centuries, AH, that is, at the same time as the rule of the Al-e Kia dynasty in eastern the Gilan.
Keywords: Kohneh Gorab, Al-e Kia, Islamic Pottery, Tiles.

Introduction
Archaeological studies in the Gilan Province in recent years have led to the identification of large Islamic sites that previously could only be recovered through historical texts. The Kohneh Gorab is one of these intermediate sites that has served as a link between its north and south. Information from historical texts has attributed the settlement in this area to the Al-e Kia family, while recent archaeological studies while confirming this attribution, have linked the settlement in this area to an older period. The main purpose of this research is the chronological study and analysis of the Kohneh Gorab site based on cultural data to identify its regional and supra-regional relationship. Important natural and historical sites, as well as destruction due to development activities, have been the most important necessities for documenting this area.
The questions are as follows: Cultural findings (tiles and pottery) of the ancient site of the Kohneh Gorab of the Amlash in terms of relative chronology and concerning related historical texts, what period can be proposed for this site? And based on cultural findings and comparative studies of pottery species and tile pieces, how can the internal and external relations of the Kohneh Gorab site with the surrounding sites be explained?
In the present study, pottery and tile pieces were collected from surface surveys in and around the historical site of the Kohneh Gorab and also drilled 15 test trench in predetermined places. For comparative studies, citation sources and descriptive-analytical methods were used in the research. The findings of this documentary method were analyzed to present the relative chronology and cultural relations within and outside the region.

The Tiles Sherds from the Kohneh Gorab
Tile pieces obtained from the historical site of the Kohneh Gorab are of high quality. to make these tiles, which are geometric shapes such as squares, rhombuses, triangles, star shapes, as well as star and cross shapes, they used the molding method and prefabricated molds. The surface of all these tiles is covered with monochromatic under turquoise glazes, azure, green, yellow, black, and also plant motifs with a combination of green, black or blue, and white. 
From comparative studies of tiles in Islamic areas in the Gilan, we conclude that small tiles in the shape of pentagons, rhombuses, and triangles in historical buildings in the east and west of the Gilan, such as the Panjpiran tepe, the historic city of the Gaskar, the Qala-e-Rudkhan of the Fooman, which is almost contemporary in time. They are used with the ancient historical site of the KOhneh Gorab (Table 1).

The Pottery of the Kohneh Gorab Site
All pottery obtained from the Kohneh Gorab site can be divided into two general categories based on simple and glazed. Plain pottery is divided into two categories: unglazed and plain pottery and unglazed and patterned pottery. Glazed pottery is also divided into two categories: plain glazed and painted glazed. Glazed and plain pottery was divided into seven types based on the color of the coating: Unglazed and plain pottery in yellowish red, unglazed and plain pottery in reddish-brown, unglazed and plain pottery in bright red, unglazed and plain pottery in reddish yellow, unglazed and plain pottery in brown, unglazed and plain light brown pottery. According to typological studies, this type of pottery was common in many areas of the Gilan Province from the 4th to the 10th century AH (Jahani, 2011; Mirsalehi, 2019; Ramin, 2006). 
Most of the pottery obtained from the Kohneh Gorab site is wheel-made and a small number of them are hand-made. Some dishes have a flat bottom and some have a long, concave base. According to the available evidence; Most of this pottery was used daily. Unglazed and painted pottery of this site can be divided into two categories based on the type of pattern: unglazed pottery with engraving, pottery with the scarred pattern. The abundance of such pottery pieces informally leads to the idea that these two types are probably of local production; However, we have to wait until laboratory studies and definite assurance in this field.

Conclusion
The main data obtained from the field survey of the Kohneh Gorab site include pieces of tiles and pottery. The tile pieces are small in size and geometric shapes (square, rhombus, pentagonal and triangular), star-shaped, covered with monochromatic glazes of blue, green, and yellow. In some of these tiles, plant motifs including arabesque and leaves have been used. Comparatively comparing these tiles with other areas, there are many similarities between them and the tiles discovered from the Panjpiran tepe in the Lahijan related to the Kiai period. From the surviving cases of these tiles and similar ones, we can mention the examples in the religious buildings of the Lahijan and the Langrud. Other data that were abundantly obtained in this site are pottery pieces belonging to the Middle Ages and late Islam. Plain pottery with carved and without patterns has a higher percentage of all pottery. These species are probably locally produced. The next groups have the most abundance of pottery with underglaze, pottery with sprayed glaze, and Sgraffito pottery after plain pottery, respectively. The Sgraffito pottery discovered from the Kohneh Gorab is technically and artistically similar to the Amol tepe. Some of the samples are of higher quality and it is possible that they came to this place from the Amol region, others were produced locally by imitating the Amol species. The black painted under the turquoise glaze and white blue pottery are another part of the cultural data obtained from this site. The better quality and lower frequency of these parts raised the issue of their import unofficially. The results of the study of these data reveal the cultural connections of this site with sites in the Gilan province such as the Panjpiran tepe of the Lahijan, Islamic city of the Gaskar, the Lisar castle, and outside the Gilan province sites such as the Amol, the Jorjan, the Neyshabur, the Rey and the Saveh. Comparative analysis of the findings indicates the settlement between the 3rd to 4th and 8th to 10th centuries AH, in which the site was relatively stable; however, to provide an accurate chronology as well as to identify the extent of the dispersal of cultural deposits, it is necessary to conduct extensive and purposeful excavations.

Abstract
Liarsang-bon ancient complex is located in Shirchak village, Rankuh section of Amlash city of Gilan province. This cemetery is located on the eastern side of the ancient complex of Liarsang-bon and at the foot of Mount Ahinbartaleh. Over 100 graves were identified and excavated in this cemetery. Based on the results of radiocarbon dating, the longevity of this cemetery has been determined simultaneously with the Parthian and Sassanid periods between the years 38 BC-123 AD and 45 BC-80 AD. The purpose of this study was to study the structure of Parthian burials in Liarsang-bon Cemetery. What has justified the necessity of the present study; Documenting and disseminating the most important achievements of the excavation is in recognizing the burial structures of the Parthian period in this region, and it is also an attempt to document the results of the excavations before the destruction of the site by natural and human factors. The authors tried to answer the following questions in the present article: What burial structures were most considered by the activists of the time in Lyarsang-bun Cemetery? Another is that these burial structures are comparable to which all-day burial structures in the region and outside the region? The result is that among the various burial methods in the Parthian era, only three types of crypts, pits and jars were identified in Liarsang-bun cemetery, which are the frequency of crypts, pits and finally jars, respectively. O indicates the variety of burials in this cemetery, which, while similar to regional burials, is reminiscent of and similar to trans-regional examples. The data of this study have been collected through information obtained from six chapters of field excavations in Liarsang-bon Cemetery and have been evaluated historically by historical descriptive analysis as well as comparison with other similar cemeteries.
Keywords: Guilan, Amlash, Cemetery, Liarsang-Bon, Parthian.

Introduction
During the six excavation seasons of Liarsang-Bon ancient cemetery between 2014, 2016, 2017, 2018 ,2019, and 2021 under the supervision of Vali Jahani a total of 130 graves were identified and excavated. In a number of pit graves and crypts, two burials have been performed simultaneously (Jahani, 2014; 2015; 2016; 2017; 2018; 2021). Based on the results of radiocarbon dating, which was extracted from the dentine collagen of two burials during the excavation of 2016 and 2017, the date of this cemetery coincides with the Parthian period between 123-38 BC and 80-45 BC. (Soltysiak & Jahani, 2019: 49). It is worth mentioning that cultural works similar to Sasanian period art have also been identified from some graves in this cemetery. It seems that this ancient site was used as a cemetery from the Parthian era to the early Islamic period. The result of five seasons of excavation of the ancient cemetery of Liarsang-Bon, many grave goods including all kinds of clay, metal and glass containers, iron and bronze weapons, personal items and accessories and a diverse number of ornaments including various types of beads, pendants, rings, bracelets, Earrings, brooches and medallions are made of various materials such as glass paste, glass, bronze, silver, gold and natural bitumen. In this research, the authors have tried to chronologically examine the frequency of burial structures and grave goods and compare these structures with contemporary examples in nearby and distant sites. Research data; It is the result of five chapters of field research in Liarsang-Bon cemetery that the authors have tried to evaluate these data by the method of historical description analysis as well as comparison with other cemeteries of the same horizon in terms of history. In the Parthian era, due to the multiplicity of religions, we see diverse and numerous ways of burial (Mohammadifar, 2014: 48). Traditionally, burial methods in this 475-year period have been considered as follows: burial in clay and stone coffins; Pithos burials; pit graves; Cellar Burials; basement graves; Well graves and temple graves.

Burial methods in Liarsang-Bon cemetery
We wrote before that about 130 graves attributable to the Parthian and Sasanian periods were excavated in this cemetery. These excavated graves have presented three types of grave structures, which included Cellar Burials, pit graves, and pit graves. Along with the dead, burial gifts such as glass, clay and metal containers (lead, bronze, gold-plated silver, etc.), metal weapons such as swords, daggers, knives and bayonets, decorative beads, bronze ornaments and seals were found. 

Cellar Burials
Among the burial methods of Liarsang-Bon cemetery, Cellar Burials have had the highest frequency. Tombs with a catacomb structure and similar to Liarsang-Bon in areas such as Khorramrud (Egami et al., 1966:4-8), Hosni Mahaleh (Sono and Fukai, 1968:27-30) located in Dilman, Vestemin area in Kiasar, Sari city (Sharifi, 2014) and also in the sites located in the steppes of southeastern Europe, Central Asia, and North Caucasus, which contain the cultural materials of the Sarmatian, Scythian, and Alani peoples. (For example, see: Moshkova, 1983: 24).

Pit Burials
The number of pit graves excavated in Liarsang-Bon cemetery is almost equal to the number of Cellar Burials. These graves were found in most of the Parthian sites, and the reasons for their creation and use are different in each site.

Pithos- Burials
14 Pithos burials for the burial of children and young people were found in the area of Liarsang-Bon. There are evidences of burials in clay Pithos in Gilan at the same time as the Parthian period, from sites such as Dilaman Qal-e Kuti (Sono and Fukai, 1968:38) and Kaloraz (Khalatbari, 2005: 35-40), Germi (Kambakhshfard, 1967) and Cheshmeh Sar Cemetery of Persepolis (Schmidt, 1953: 117-160), and Valiran Damavand cemetery (Nemati and Sadraei, 2012: 110) has been reported.

Discussion and analysis
Liarsang-Bon cemetery in Amlash region, due to its location at an important point between Marlik and Kaloraz cemeteries in the Iron Age, as well as the continuation of the burial traditions of other contemporary cemeteries such as Qal-e Kuti and Hosni Mahaleh, can indicate the total prevalence and all the methods of Burials as well as homogeneous cultures were in progress in this region from the end of the Iron Age to the end of the Sassanid period (Jahani and Babayev, 2017: 58-59). This homogeneity in the structure of graves, including Cellar Burials, which was seen in large numbers in Liarsang-Bon cemetery, was previously also observed in regional cemeteries such as Khorramrud (Egami et al., 1966: 4-8), Hosni Mohaleh cemetery (Sono and Fukai, 1968:27-30) Westmin Kiasar cemetery (Sharifi, 2014) was observed. Also, structures known as catacombs were identified in the discovered extra-regional graves, including in areas of the south and southwest of Iran, which, as a rule, due to the influence of the climate on the process of building tombs and burials, the differences between these two parts of Iran’s geography in terms of burial structures in the Parthian era, it should be assumed.
 Regarding the origin of this method of burial in the Parthian era, in addition to the cultures within the administrative geography of the Parthian era and its relatively rich background, attention is also paid to the Indo-Iranian and Indo-European peoples of the steppes of Central Asia to the northern parts of Europe (Zadenprovsky, 1997: 327 -340). The number of Cellar Burials and pit graves can be cautiously attributed to a relatively bipolar society. Economic and social conditions and the time of burial (including the urgency of battle, looting, unexpected natural disasters such as floods, earthquakes, etc.) have also been influential in creating such a burial style. Based on the type of grave goods, this type of graves has been attributed to the Parthian period to the beginning of the Sassanid period (Jahani, 2017-2021).

Conclusion
As a result of the field research conducted in Liarsang-Bon area, graves including crypt, simple pit and Pithos types were identified in the cemetery section. The absolute chronology and typology researches conducted on the grave goods from these graves show the artistic features of the Parthian and early Sasanian periods. Most of the graves are dug in the east-west direction and the bodies are often buried on the left side. Most of the burials obtained from these graves are of the squatting type and most of the bodies are on the left side. Simple pit graves and Cellar Burials have the largest number of burial structures. Burial structures known as crypts as well as their grave goods are similar to the samples discovered in the northern region of Iran, such as in Khorramroud, Westmin Kiasar and Hosni Mahaleh cemetery, and also with areas of the south and southwest of Iran and even the northern steppes in Europe is also comparable. Pit graves can also be compared with other similar burials of the Parthian era in general and only through grave goods. Graves with a Pithos structure in Liarsang-Bon cemetery are comparable to other similar burials that were identified in several cemeteries of the Parthian period, such as Sang Shir Hamadan, Germi Moghan, Cheshme Sar, Persepolis. In this way, with caution and according to the amount of data and the analysis of the four Styles tombs resulting from the excavation of the Liarsang-Bon cemetery, the burial culture related to the Parthian era and the period after that, i.e. the Sassanid era; It indicates a two-way and even direct connection with different regions, including the lands located in the northern regions of Iran and more remote lands in the south and west, which has led to the expansion of diverse burial cultures, which pay attention to the climatic conditions, customs and traditions as well reflects.