Erzurum
Turkey
Also known as: Arz ar-Rūm, Arzan ar-Rūm, Theodosiopolis
Erzurum, city, eastern Turkey. It lies 6,400 feet (1,950 metres) above sea level in a fertile plain surrounded by high mountains. On a caravan route from Anatolia to Iran, Erzurum has been a major commercial and military centre since antiquity and is now a major rail station on the route between Ankara and Iran. Although its foundation was probably much earlier, Erzurum achieved real importance as Theodosiopolis, a 5th-century-ce Byzantine fortress that fell to the...