TEHRAN -- More than three 
decades after a bulldozer accidentally exposed the Bandiyan archaeological site in northeastern Iran, a fresh assessment by a museum researcher is drawing attention to the Sasanian complex’s historical significance, continuing archaeological potential and tourism prospects.
Bandiyan, in Dargaz County of Razavi Khorasan Province, was little more than a mound among agricultural fields until 1990, when a landowner sought to level the area. The bulldozer blade struck buried columns and exposed fragments of decorated plaster, revealing remains from a much earlier period.
Scientific excavations began in 1994 and were carried out over 11 seasons, eventually uncovering the remains of a major Sasanian fire temple dating to around 1,500 years ago and associated with the reign of Bahram V.
Muhammad-Reza Kargar, a museum researcher, told the Iranian Students News Agency that the discovery had helped reveal aspects of the Sasanian period that had previously remained hidden. He described Bandiyan as one of the most important discoveries for understanding the history of the region.
Dargaz has held strategic importance since antiquity because of its location in northeastern Iran, Kargar said. During the Sasanian period, the region was an important base for protecting the empire’s eastern frontier.
The Sasanian Empire, the last major Iranian dynasty before the advent of Islam, ruled for more than four centuries and extended across a vast territory. Although its capital was at Ctesiphon, near present-day Baghdad, northeastern frontier regions such as Dargaz had an important defensive role.
The surviving remains at Bandiyan provide a detailed picture of Sasanian architecture and artistic traditions. The main hall contains four columns and seven stucco scenes depicting hunting, warfare, Iranian victories, religious practices, investiture and feasting. Middle Persian inscriptions in the Sasanian script appear alongside some of the reliefs.
Although erosion and the passage of time have damaged the stucco work, Kargar said the surviving sections are sufficient to demonstrate the artistic refinement of the reliefs.
The complex covers about 100 meters and includes a central space opening onto a surrounding area.

 A fire altar found at the site provides evidence of Zoroastrian religious practices and the importance attached to sacred fire during the Sasanian period.
Other features include an offering room, a basin associated with ritual washing and an ossuary. In Zoroastrian funerary practice, the bodies of the dead were placed in towers of silence and, after the flesh had been removed, the remaining bones were collected and placed in ossuaries. Evidence of such practices has been identified at Bandiyan.
Kargar said the archaeological evidence indicates that Bandiyan was more than a religious structure, describing it as a central complex with ceremonial, governmental and religious functions.
Following the excavations, Iran’s Ministry of Cultural Heritage, Tourism and Handicrafts developed the site as the Bandiyan Dargaz Site Museum, allowing visitors to see both the architectural remains and objects recovered during archaeological work.
The site was registered on Iran’s national heritage list on February 13, 1997, under registration No. 1846. Kargar said continued excavation could still produce new discoveries, noting that the wider complex includes industrial workshops, large structures with governmental and religious functions and a tower of silence.
He described Bandiyan as a 1,500- to 1,600-year-old heritage complex and said it represents only part of Dargaz County’s much broader historical potential. The area has a history stretching back thousands of years and contains numerous archaeological and cultural sites.
Kargar also highlighted the tourism potential of villages surrounding Dargaz. Local cuisine, traditional clothing and handicrafts, he said, could be incorporated into one-day tourism programs offering visitors a closer look at the region’s history, culture and traditional way of life.
He nevertheless criticized weaknesses in the production of cultural souvenirs and heritage-related memorabilia at Iranian historical sites. While occasional agreements have been made to produce such data-x-items for major museums and archaeological attractions, he said sustained management and initiative in this area remain lacking.
More than 30 years after the accidental discovery that transformed an agricultural mound into an archaeological landmark, Bandiyan continues to offer researchers opportunities to investigate the religious, artistic and political world of Sasanian Iran. 
For Kargar, further excavation and greater attention to the surrounding region could turn the site into an even more significant cultural and tourism destination.