Kaliningrad, a tiny piece of Russia, located on the Baltic Sea between Lithuania and Poland, since its founding by the Teutonic Knights in the XIII century. and before World War II it was called Koenigsberg. After it was renamed, they settled in Russian and made part of the Soviet Union. The area was mined for centuries amber. Today in the Kaliningrad region are the world's largest reserves of amber. The main attraction of the city - Königsberg Cathedral.