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 2004. The civil law and commercial law is codified in a single legal act - the Civil Code of the Republic of Lithuania () which is in force since 1 July 2001. It is influenced by the civil codes of Quebec and the Netherlands. The commercial law in Lithuania is of an increasingly excellent drafting quality and the market in Lithuanian legal services is now increasingly competitive. Legal professionals are prepared and the law is researched in departments of three universities of Lithuania: Law of Lithuania Lithuanian law is a part of the legal system of Lithuania. It belongs to