Saint Petersburg is located in the Northwestern region of Russia south of Finland on the Baltic Sea. It was found by Tsar Peter the Great in 1703. In 1914 it was renamed Petrograd and then in 1924 to Leningrad and then finally in 1991 it was changed back to Saint Petersburg. The city is young compared to other cities throughout Europe, but has been the focal point for many historical events in the past 300 years. What started as a Swedish fortress captured by Russia, the city was the start of the Russian revolution of 1917, and was besieged for 872 days during WWII becoming one of the most longest besieged cities in modern history.