Aššur (; Sumerian: AN.ŠAR2KI, Assyrian cuneiform: "Aš-šurKI", "City of God Aššur"; "Āšūr"; Old Persian "Aθur", : "Āšūr"; : ', ), also known as Ashur and Qal'at Sherqat'", was the capital of the Old Assyrian Empire (2025–1750 BC), the Middle Assyrian Empire (1365–1050 BC), and for a time, of the Neo-Assyrian Empire (911–608 BC). The remains of the city lie on the western bank of the Tigris River, north of the confluence with its tributary, the Little Zab, in what is now Iraq, more precisely in the al-Shirqat District of the Saladin Governorate.