NACHITSHEVAN, a town of Asiatic Russia, in the province of Erivan, occupies a lofty plain, near the Aras, 175 miles S. of Tiflis, and 64 S.E. of Erivan. It has three churches and a town-house; carries on the manufacture of leather and of earthenware; and is also a place of some trade. It was formerly the chief town in Armenia, but has recently much declined, and seems to have been much injured by the earthquake which took place in 1840. Pop. (1851) 5157.