Arzamas (Russian: Арзамас) is a town in Nizhny Novgorod Oblast, Russia, located on the Tesha River (a tributary of the Oka River), 300 km east of Moscow. First mentioned in 1552, it has been an official town since 1719. Its geographical coordinates are approximately 55°28′N 43°52′E. Nizhny Novgorod Oblast (Нижегоро́дская о́бласть) is a federal subject of Russia (an oblast). ... A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ... Ока Length 1,500 km Elevation of the source  ? m Average discharge  ? m³/s Area watershed  ? km² Origin  ? Mouth  Volga River Basin countries Russia Oka (Russian: Ока́) is a great river in Russia, right confluent of Volga. ... Moscow (Russian: Москва́, Moskva, IPA: â–¶ (help· info)) is the capital of Russia, located on the river Moskva. ... Events April - War between Henry II of France and Emperor Charles V. Henry invades Lorraine and captures Toul, Metz, and Verdun. ... // Events January 23 - The Principality of Liechtenstein is created within the Holy Roman Empire April 25 - Daniel Defoe publishes Robinson Crusoe June 10 - Battle of Glen Shiel Prussia conducts Europes first systematic census Miners in Falun, Sweden find an apparently petrified body of Fet-Mats Israelsson in an unused...