Different peoples inhabited the city, including the Halafians, Semites and the Hurrians. Tell Brak was a religious center from its earliest periods; its famous Eye Temple is unique in the Fertile Crescent, and its main deity, Belet-Nagar, was revered in the entire Khabur region, making the city a pilgrimage site. The culture of Tell Brak was defined by the different civilizations that inhabited it, and it was famous for its glyptic style, equids and glass. When independent, the city was ruled by a local assembly or by a monarch. Tell Brak was a trade center due to its location between Anatolia, the Levant and southern Mesopotamia. It was excavated by Max Mallowan in 1937, then regularly by different teams between 1979 and 2011, when the work stopped due to the Syrian Civil War.