Erzerum (60), a city in Turkish Armenia, capital of the province of the same name, 125 m. SE. of Trebizond; situated on a fertile plain 6300 ft. above sea-level; is an important entrepôt for commerce between Europe and Asia; is irregularly built, but contains imposing ruins; has a fortress, and in the suburbs a number of mosques and bazaars; is famed for its iron and copper ware; fell into the hands of the Turks in 1517; figured as a military centre in many Turkish wars; was reduced by the Russians in 1878; was a scene of Armenian massacres by the Turks in 1895.