Galatia (gəˈleɪʃə; Γαλατία, Galatía, "Gaul") was an ancient area in the highlands of central Anatolia, roughly corresponding to the provinces of Ankara and Eskişehir, in modern Turkey. Galatia was named after the Gauls from Thrace (cf. Tylis), who settled here and became a small transient foreign tribe in the 3rd century BC, following the Gallic invasion of the Balkans in 279 BC. It has been called the "Gallia" of the East.
Galatia was bounded on the north by Bithynia and Paphlagonia, on the east by Pontus and Cappadocia, on the south by Cilicia and Lycaonia, and on the west by Phrygia. Its capital was Ancyra (i.e. Ankara, today the capital of modern Turkey).
The terms "Galatians" came to be used by the Greeks for the three Celtic peoples of Anatolia: the Tectosages, the Trocmii, and the Tolistobogii. By the 1st century BC, the Celts had become so Hellenized that some Greek writers called them Hellenogalatai (Ἑλληνογαλάτα