Kolomna

Kolomna was a fortified town at the confluence of the Moskva and Oka rivers, first recorded in 1177. Mongol forces destroyed it in 1238, and in 1301 it passed into the Principality of Moscow.

Dmitry Donskoy gathered his troops at Kolomna before the Battle of Kulikovo in 1380. Under Vasily III, a stone kremlin was built there in 1525–1531 as part of Moscow's southern defences.