Vilnius is the capital of Lithuania and its largest city, with a population of 542,664. Vilnius is located in the southeast part of Lithuania and is the second largest city in the Baltic states. Vilnius is the seat of the main government institutions of Lithuania as well as of the Vilnius District Municipality. Vilnius is classified as a Gamma global city according to GaWC studies, and is known for the architecture in its Old Town, declared a UNESCO World Heritage Site in 1994. In 2009, Vilnius was the European Capital of Culture.