Jurij Slatkonja was a choirmaster for which State of the Holy Roman Empire?
Jurij Slatkonja Jurij Slatkonja (German: "Georg von Slatkonia" , also "Jurij Chrysippus," Slovenian: "Jurij Slatkonja"; 21 March 1456–26 April 1522) was a Carniolan choirmaster and the first residential Bishop of Vienna. He was also the first owner of an ex libris among the Slovenes. His crest contained a golden horse, from which comes his surname (Slovene "slat" [= "zlat"] 'golden' + "konj" 'horse').
Lazar of Serbia Prince Lazar Hrebeljanović (; ca. 1329 – 15 June 1389) was a medieval Serbian ruler who created the largest and most powerful state on the territory of the disintegrated Serbian Empire. Lazar's state, referred to by historians as Moravian Serbia, comprised the basins of the Great Morava, West Morava, and South Morava rivers. Lazar ruled Moravian Serbia from 1373 until his death in 1389. He sought to resurrect the Serbian Empire and place himself at its helm, claiming to be the direct successor of the Nemanjić dynasty, which went extinct in 1371 after ruling over Serbia for two centuries. Lazar's programme had the full support of the Serbian Orthodox Church, but the Serbian nobility did not recognize him as their supreme ruler.