Sanliurfa (also called simply, "Urfa") is a province in Southeast Anatolia, Turkey. It is also the name of a city within the province. Extending over a territory of 18,584 km² (7,173 sq. miles), with: Adıyaman to the north; Syria to the south; the provinces of Mardin and Diyarbakir to the east; and Gaziantep to the west; the province of Sanliurfa is the largest province of Southeast Anatolia. The Sanliurfa and Harran Plains extend over an area of about 1,500 km² (579 sq. miles).