Stefan Uroš IV Dušan (Serbian Cyrillic: Стефан Урош IV Душан, pronounced [stêfaːn ûroʃ tʃětʋr̩ːtiː dǔʃan]), known as Dušan the Mighty (Душан Силни/Dušan Silni; c. 1308 – 20 December 1355), was the King of Serbia from 8 September 1331 and Emperor of the Serbs and Greeks from 16 April 1346 until his death. Dušan conquered a large part of southeast Europe, becoming one of the most powerful monarchs of the era. He enacted the constitution of the Serbian Empire, known as Dušan's Code, perhaps the most important literary work of medieval Serbia.

Dušan promoted the Serbian Church from an archbishopric to a Patriarchate, finished the construction of the Visoki Dečani monastery (a UNESCO site), and founded the Saint Archangels Monastery, among others. Under his rule Serbia reached its territorial, political, economic, and cultural peak.

Dušan died in 1355, seen as the end of resistance against the advancing Ottoman Empire and the subsequent fall of the Eastern Orthodox Church in the region.

In 1314, Serbian King Stefan Milutin quarreled with his son, Stefan Dečanski. Milutin sent Dečanski to Constantinople to have him blinded, though he was never totally blinded. Dečanski wrote to Danilo, the Bishop of Hum, asking him to intervene with his father. Danilo wrote to Archbishop Nicodemus of Serbia, who spoke with Milutin and persuaded him to recall his son. In 1320 Dečanski was permitted to return to Serbia and was given the appanage of 'Budimlje' (modern Berane), while his half-brother, Stefan Konstantin, held the province of Zeta.

...
Wikipedia