Ancient city of Babylonia, southwest of Baghdad, Iraq, an ancient Sumerian city lying on a canal linking the Tigris and the Euphrates. It was an important religious and trading center in southern Mesopotamia. Sippar was subject to the 1st dynasty of Babylon, but little is known about the city before 1174 BC, when it was sacked by the Elamite king Kutir-Nahhunte. It recovered and was later captured by the Assyrian king Tiglath-pileser I. Under the 8th dynasty of Babylon (c 880), Sippar's great Temple of Shamash was rebuilt. Tens of thousands of tablets from Old Babylonian and Neo-Babylonian periods have been found.