Aššur (Akkadian; Syriac: ܐܫܘܪ 'Āshūr; Hebrew: אַשּׁוּר Aššûr, Arabic: اشور: Āshūr, Kurdish Asûr), also known as Ashur and Qal'at Sherqat, was an Assyrian city, capital of the Old Assyrian Empire (2025–1750 BC), Middle Assyrian Empire (1365–1050 BC), and for a time, the Neo-Assyrian Empire (911–605 BC).