 The term "Moravian Serbia" refers to the fact that the state comprised the basins of the Great Morava, West Morava, and South Morava rivers in present-day central Serbia.Lazar Hrebeljanović was born in around 1329 in the fortress of Prilepac, near the town of Novo Brdo in the region of Kosovo, Kingdom of Serbia.Lazar was a courtier at the court of Serbian Tsar Stefan Uroš Dušan, and at the court of Dušan's successor, Tsar Stefan Uroš V (r. 1356–1371).