:"For the villages in Azerbaijan, see Sarov, Azerbaijan and Bəyimsarov."Sarov (Саро́в) is a closed town in Nizhny Novgorod Oblast, Russia. Until 1995 it was known as Kremlyov (Кремлёв). Between 1946–1991 it was called Arzamas-16 (Арзама́с-16) and was considered a closed town generally off limits to foreigners. It is th...