50 litas coin dedicated to the 100^th Anniversary of the Great Seimas of Vilnius.

The Great Seimas of Vilnius (Lithuanian: Didysis Vilniaus Seimas, also known as the Great Assembly of Vilnius, the Grand Diet of Vilnius, or the Great Diet of Vilnius), was a major assembly held on December 4 and 5, 1905 (November 21–22, 1905 O.S.) in Vilnius, Lithuania, then part of the Russian Empire, largely inspired by the Russian Revolution of 1905. It was the first modern national congress in Lithuania and dealt primarily not with the social issues that sparked the revolution, but with national concerns. Over 2,000 participants took part in the Seimas. The assembly made the decision to demand wide political autonomy within the Russian Empire and achieve this by peaceful means. It is considered an important step towards the Act of Independence of Lithuania, adopted on February 16, 1918 by the Council of Lithuania, as the Seimas laid the groundwork for the establishment of an independent Lithuanian state.