The city of Vilnius, the capital and largest city of Lithuania, has undergone a diverse history since it was first settled in the Stone Age. Vilnius was the head of the Grand Duchy of Lithuania right until 1795, even during the Polish–Lithuanian Commonwealth. The city has changed hands many times between Imperial and Soviet Russia, Napoleonic France, Imperial and Nazi Germany, Interwar Poland, and Lithuania. It was especially often the site of conflict after the end of World War I and during World War II. It officially became the capital of independent, modern-day Lithuania when the Soviet Union recognized the country's independence in August 1991.