What was the name of the area in the highlands of central Anatolia ruled by Deiotarus?
Deiotarus Deiotarus of Galatia (in Galatian and Greek Deiotaros, surnamed Philoromaios;  105 BC 42 BC, 41 BC or 40 BC) was a Chief Tetrarch of the Tolistobogii in western Galatia, Asia Minor, and a King of Galatia ("Gallo-Graecia"). He was considered one of the most adept of Celtic kings, ruling the three tribes of Celtic Galatia from his fortress in Blucium.
Rûm Eyalet Eyalet of Rûm (Ottoman Turkish: ایالت روم; Eyālet-i Rūm‎ ; originally Arabic for Eastern Roman Empire), later named as the Eyalet of Sivas (Ottoman Turkish: ایالت سیواس; Eyālet-i Sīvās‎ ), was an Ottoman eyalet in northern Anatolia, founded following Bayezid I's conquest of the area in the 1390s. The capital was the city of Amasya, which was then moved to Tokat and later to Sivas. Its reported area in the 19th century was 28912 sqmi .