Užupis is a neighborhood in Vilnius, the capital of Lithuania, largely located in Vilnius's old town, a UNESCO World Heritage Site. Užupis means "beyond the river" or "the other side of the river" in the Lithuanian language and refers to the Vilnia River; the name Vilnius was derived from the Vilnia. The district has been popular with artists for some time, and has been compared to Montmartre in Paris and to Freetown Christiania in Copenhagen, due to its bohemian and laissez-faire atmosphere. On April 1, 1997, the district declared itself an independent republic, with its own constitution.

The Old Town of Vilnius, one of the largest surviving medieval old towns in Northern Europe, has an area of 3.59 square kilometres. It encompasses 74 quarters, with 70 streets and lanes numbering 1487 buildings with a total floor area of 1,497,000 square meters. It was founded by the Lithuanian Grand Duke and King of Poland Jogaila in 1387 on the Magdeburg rights the oldest part of the Lithuanian capital of Vilnius, it had been developed over the course of many centuries, and has been shaped by the city's history and a constantly changing cultural influence. It is a place where some of Europe's greatest architectural styles—gothic, renaissance, baroque and neoclassical—stand side by side and complement each other. There are many Catholic, Lutheran and Orthodox churches, residential houses, cultural and architectural monuments, museums in the Old Town.