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
National symbols of Lithuania his capital. The Iron Wolf Mechanised Infantry Brigade ("motorizuotoji pėstininkų brigada 'Geležinis vilkas"') is now the core unit of the Lithuanian Army. The bear is an ancient symbol of Samogitia, one of the regions of Lithuania, and appears in the coat of arms of Šiauliai district. A moose is shown in the Lazdijai district municipality coat of arms and the aurochs is featured in the Kaunas coat of arms. The national plant is rue ("rūta"). A bride traditionally wears a little crown made of rue, which is a symbol of maidenhood. During the wedding the crown is burned, symbolizing the