Vilnius Region (Lithuanian: Vilniaus kraštas, Polish: Wileńszczyzna, Belarusian: Віленшчына, former English: Wilno or Wilna Region) is the territory in the present day Lithuania that was originally inhabited by ethnic Baltic tribes and was a part of Lithuania proper, but came under East Slavic and Polish cultural influences over time.
The territory included Vilnius, the historical capital of the Grand Duchy of Lithuania. Lithuania, after declaring independence from the Russian Empire, claimed the Vilnius Region based on this historical legacy. Poland argued for the right of self-determination of the local Poles. As a result, throughout the interwar period the control over the area was disputed between Poland and Lithuania. The Soviet Union recognized it as part of Lithuania in the Soviet-Lithuanian Treaty of 1920, but in 1920 it was seized by Poland and became part of short lived puppet state of Central Lithuania, and was subsequently incorporated into the Second Polish Republic.
Vilnius (Lithuanian pronunciation: [ˈvʲɪlʲnʲʊs]; Polish: Wilno, see also other names) is the capital of Lithuania and its largest city, with a population of 542,664 as of 2015. 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 Vilnius City Municipality and of the Vilnius District Municipality. It is also the capital of Vilnius County. The first known written record of Vilnius as the Lithuanian capital is known from Gediminas' letters in 1323.
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. Its Jewish influence until the 20th century has led to it being described as the "Jerusalem of Lithuania" and Napoleon named it "the Jerusalem of the North" as he was passing through in 1812. In 2009, Vilnius was the European Capital of Culture, together with the Austrian city of Linz.