Adiyaman lies in the southeast of Turkey in the central Firat (Euphrates) river region. According to archaeological research the history of the area goes back to the Paleolithic Age. During the Neolithic Age (8000-7000 B.C.) Gritille, Hayaz, Ancoz and Samsat were the main culture centers.
Topping the karst limestone mountain of Nemrut Dagi (2150m/7056ft) in the south-eastern Taurus 90km/56 miles north-east of Adiyaman is the Hierothosion of the Kommagene King Antiochus I (69-38 B.C.), dedicated to his own glory and that of the gods.