Qalinj Agha Hill is an important archaeological site located in the center of Erbil. Its name is derived from the word 'Qala Anje', which means 'The Small Mound', in contrast to the huge Erbil Citadel lying one kilometer away. Qalinj Agha Hill is only 7 meter high. The archaeological excavations that were first undertaken in 1966 determined that Qalinj Agha Hill had been the site of several historical inhabitations. These periods during the fourth and fifth millennia B.C. were known as the Hulf-Warka era.