Jovan Oliver was a noble who served as veliki čelnik and despot under the Serbian Emperor Dušan the Mighty, who was Serbia's King and Tsar and autocrat of the Serbs and Greeks.
Jovan Oliver was a noble who served as veliki čelnik and despot under the Serbian Emperor Dušan the Mighty, who was Serbia's King and Tsar and autocrat of the Serbs and Greeks.