Ostrov, is a town in the Carlsbad Region, Czech Republic. It is located at a foothill of the Ore Mountains about 10 km northeast of Karlovy Vary and has a population of 16,999 (September, 2009). The origin of the settlement named Zlaukowerde (Slávek's Island) at the confluence of Byst ice and Jáchymovský Creeks traces back to the beginning of the 13th century. The town charter for Ostrov was issued by Bohemian king John the Blind in 1331. The population of Ostrov multiplied after WWII with a boom of uranium mining in nearby Jáchymov. The extensive housing blocks from the 1950s forming the new part of Ostrov are considered one of the best examples of socialist realism architecture in the Czech Republic.