Nizhny Novgorod was founded by Prince Yuri II of Vladimir in 4 February 1221. Citizens organized an army to liberate Moscow from the Poles in 1611, led by Kuzma Minin and Prince Dmitry Pozharsky. During the Russian Empire, in 1817 Nizhny Novgorod became the country's main trading city. In 1896, the city hosted the largest All-Russia exhibition. In the Soviet era, Nizhny Novgorod was renamed Gorky, in honor of the writer Maxim Gorky. Then it was the industrial center of the Soviet Union. During the World War II, the city sent to the front a huge amount of military equipment and ammunition. Therefore, the German air force bombed the city for 3 years. After the dissolution of the Soviet Union, the city was renamed back to Nizhny Novgorod. In Russia, the city became a political center and the capital of the Volga Federal District. Now the city is the center of information technology and develops tourism.