added by archaeologs A tell site east of the Tigris River near Khorsabad, Iraq, occupied from the 6th-2nd millennia BC. The earliest material was of the Halaf period, while the succeeding period shows increasing contacts with the southern Mesopotamian 'Ubaid culture. It was as a northern outpost of the 'Ubaid culture in the 5th-4th millennia. Three temples facing onto open courtyards show resemblance to works at Eridu and Warka. There is evidence for surprisingly extensive trade. Neolithic settlers used undecorated pottery and Halaf pottery. The succeeding period is contemporary with the Uruk and Jemdet Nasr periods to the south; this is often described as the 'Gawra period' late 4th millennium BC). In this period there is abundant evidence for differential wealth and social position, seen in the grave goods. Several temples of the period have an unusual form with separate portico. The most distinctive building of this phase, however, is a circular structure known as the 'Round House'.