Harran is a ruined city in south-eastern Turkey not far from the Syrian border. It dates back many millennia and is believed to be by many people to be the Harran mentioned in Genesis where Abraham and Sarah (then still named Abram and Sarai) settled when they left Ur of the Chaldees. The city remained resolutely pagan throughout the late antique period and was dedicated to the moon god, Sin. Perhaps this was to mark its difference from the nearby Christian city of Edessa, but Harran was later swift to embrace Islam. Today its most significant monument is the extensive ruin of Harran's vast C8th congregational mosque, the minaret of which is still extant.