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'' ktetor '' portrait in the treskavec monastery . after 1352 eastern orthodox christianity treskavec monastery 200px tepčija gradislav.jpg gradislav borilović
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gradislav borilović

gradislav borilović -lrb- , ; 1325 -- 1352 -rrb- was a serbian magnate in the service of stefan uroš iii dečanski -lrb- r. 1321-1331 -rrb- and stefan dušan -lrb- r. 1331-1355 -rrb- , having the titles of `` vojvoda '' -lrb- general -rrb- , `` kaznac '' -lrb- treasurer -rrb- , and `` tepčija '' -lrb- educator -rrb- .
gradislav led the serbian army that fought the ottoman emirate at the battle of demotika in october 1352 .
the battle was fought between the allies of the two rival byzantine emperors , john v palaiologos and john vi kantakouzenos , and it was the first major battle of the ottomans on european soil , which ended in a serbian defeat .
greek sources spoke of gradislav as `` truly one of the most respectable among the serbs '' .
