Ryazan is a city and the administrative center of Ryazan Oblast, Russia, located on the Oka River  southeast of Moscow. Population:

It is argued that the Ryazan kremlin was founded in 800, by Slavic settlers, as a part of their drive into territory previously populated by Finnic peoples. Initially it was built of wood, gradually replaced by masonry. The oldest preserved part of the kremlin dates back to the 12th century.