Königsberg was a German city established in the 13th century, which after the defeat of Nazi Germany became part of the Soviet Union and was renamed to Kaliningrad in 1946. After the fall of the USSR, Kaliningrad became part of Russia. Founded in 1255 on the site of the Old Prussian settlement Twangste by the Teutonic Knights during the Baltic Crusades, Königsberg received its name in honour of King Ottokar II of Bohemia, who led a campaign against the pagan Old Prussians, a Baltic tribe that was native to the area.