Liubartas

Demetrius of Liubar
Modern illustration
Grand Prince of Volhynia
Reign1340–1383
PredecessorGeorge II Boleslav (as King of Rus)
SuccessorTheodore of Volhynia [uk]
Diedc. 1383
Spouse1. Euphemia of Volhynia;
2. Daughter of Konstantin of Rostov
HouseGediminids
FatherGediminas
Lutsk Castle, Ukraine, built by Liubartas and improved by Vytautas the Great. During Lithuanian rule the city started to prosper

Liubartas or Demetrius of Liubar (also Lubart, Lubko, Lubardus, baptized Dmitry; died c. 1383) was Prince of Lutsk and Liubar (Volhynia) (1323–1383), Prince of Zhytomyr (1363–1374), Grand Prince of Volhynia (1340–1383), Grand Prince of Halych–Volhynia (1340–1349).