Duchy of Lithuania Duchy of Lithuania Duchy of Lithuania (; ) was a state-territorial formation of ethnic Lithuanians, that existed from the 13th century until 1413. Most of the time it was a constituent part and a nucleus of the Grand Duchy of Lithuania. Other alternative names of the territorial formation, used in different periods, were Aukštaitija or Land of Lithuania (13th century), Duchy of Vilnius (14th – early 15th centuries), Lithuania Propria or simply Lithuania (in a narrow sense). The formation emerged in the central and eastern part of the present-day Lithuania, known as Aukštaitija, as the Lietuva Land (). It is
Office of the Chief Archivist of Lithuania Lithuania. Its main functions are to: Office of the Chief Archivist of Lithuania The Office of the Chief Archivist of Lithuania is a government agency, which participates in the shaping of national policy in the field of management and use of documents and archives, as well as implements this policy, supports the Chief Archivist of Lithuania in the carrying-out of state administration of the field of documents and archives. The emergence of archives in Lithuania is associated with the formation of the Lithuanian state in the first half of the 13th century. The old Lithuanian chancery archives of Grand Duke