KOLOMNA is an ancient city of Moscow Oblast, Russia, situated at the confluence of the Moskva and Oka Rivers, 114 kilometers southeast of Moscow. Population: 144,589 Due to sensitive military production of missile components, Kolomna was a closed city until 1994. It is still not listed as a city of the Golden Ring, despite its kremlin and the large number of well-preserved churches and monasteries. The Kolomna Speed Skating Center is an indoor ice speed skating oval used for Russian and international championships. It hosted the 2008 European Speed Skating Championships and the 2016 World Single Distance Speed Skating Championships. The Kolomna Speed Skating Center is considered as one of the most modern ice speed skating ovals in the world.