In ancient geography, especially in Roman sources, Dacia (/ˈdeɪʃiə, -ʃə/) was the land inhabited by the Dacians. The Greeks referred to them as the Getae, which were specifically a branch of the Thracians north of the Haemus range.Dacia was bounded in the south approximately by the Danubius river (Danube), in Greek sources the Istros, or at its greatest extent, by the Haemus Mons (the Balkan Mountains).