The city of Aššur and Nineveh (modern day Mosul), which was the oldest and largest city of the ancient Assyrian empire,[7] together with a number of other Assyrian cities, seem to have been established by 2600 BC. However it is likely that they were initially Sumerian-dominated administrative centres. In the late 26th century BC, Eannatum of Lagash, then the dominant Sumerian ruler in Mesopotamia, mentions "smiting Subartu" (Subartu being the Sumerian name for Assyria).