Adiyaman is a city in southeastern Turkey, capital of the Adiyaman Province. It is one of the fastest-growing cities in Turkey. The population rose from 100,045 to 202,735 in 2010. The city has a significant Kurdish minority. The city officially had the Arabic name Hisn-i Mansur until the year 1926, named after the fortified castle perched on a hill around which the city grew. A Kurdish variation of the same name, Semsur, is also attested in Ottoman sources. As the official name was difficult for the locals to pronounce, people were referring the city as adi yaman since early 19th century, which means "its name is tough" or " whose name is tough" in Turkish.