John Uroš

Jovan Uroš Nemanjić or John Ouresis Doukas Palaiologos or Joasaph of Meteora, was the ruler of Thessaly from c. 1370 to c. 1373, retiring as a monk for the next half century thereafter. He died in 1422 or 1423. By birth, he was member of the Nemanjić dynasty, ruling family of the Serbian Empire.