Gdynia is a port town in the Pomeranian region at the Bay of Gdansk. It is one of the three cities which belong to the famous Tricity urban area. The rapid development of Gdynia began in 1920-ties, following the Polish government’s decision to build the country’s major seaport at Gdynia village. The construction of the seaport started in 1921. The settlement started to extend drastically as workers from all over the country came here to help build the port. In 1923 the first ship (the French ship Kentucky), entered the harbour. Within several years Gdynia developed from a small village to the most modern port town on the Baltic Sea. By the outbreak of the World War 2, it grew to the 6th largest city in Poland. Nowadays, the modern city attracts tourists with the unique atmosphere of a harborside, famous ships docked at the Gdynia port and the popular Marine Aquarium.