Duchy of Lithuania

Duchy of Lithuania Lietuvos kunigaikštystė (lt)
Division of Grand Duchy of Lithuania
13th century–1413
Coat of arms
Domain of King Mindaugas (dark yellow) during the times of the Kingdom of Lithuania, making up the initial Duchy of Lithuania.
Government
• Type	Feudal monarchy
Grand Duke of Lithuania
• ca. 1236–1263	Mindaugas
• 1295–1316	Vytenis
• 1316–1341	Gediminas
• 1345–1377	Algirdas
• 1377–1392	Jogaila
• 1392–1413	Vytautas
Historical era	Middle Ages
• Established	13th century
• Union of Horodło	1413
Succeeded by Kingdom of Lithuania
Today part of	Belarus Lithuania Latvia

The Duchy of Lithuania (Latin: Ducatus Lithuaniae; Lithuanian: Lietuvos kunigaikštystė) was a state-territorial formation of ethnic Lithuanians that existed from the 13th century^[1] to 1413. For most of its existence, 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),^[2] Lithuania proper, or simply Lithuania (in a narrow sense).