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
Law of Lithuania Law of Lithuania Lithuanian law is a part of the legal system of Lithuania. It belongs to the civil law legal system, as opposed to the common law legal system. The legal system of Lithuania is based on epitomes of the French and German systems. The Lithuanian legal system is grounded on the principles laid out in the Constitution of the Republic of Lithuania and safeguarded by the Constitutional Court of the Republic of Lithuania. The Lithuanian law has a long history. The origins are traced back to the first written source, the Casimir Code (), published in 1468 by