Vlastimir was the prince of Serbia from c. 830 until c. 851. Little is known of his reign. He held Serbia during the growing threat posed by the neighbouring, hitherto peaceful, First Bulgarian Empire
Romanticized depiction by Kosta Mandrović (1885)
Emperor Theophilos, who was the overlord of the Serbs, was prohibited to aid Vlastimir in a potential war with the Bulgarians as a peace treaty was in effect. Some historians maintain that he had an important part in the Bulgar-Serb war.
The House of Vlastimirović was the first Serbian royal dynasty, named after Prince Vlastimir, who was recognized by the Byzantine Empire. The dynasty was established with the unnamed 7th-century Serbi
Vlastimir
…was devastated and driven out. Vlastimir then turned to the west, expanding well into the hinterland of Dalmatia. He is the eponymous founder of the Vlastimirović dynasty, the first Serbian dynasty. The unnamed 7th-century Serbian ruler (prince, archon) who led the Serbs to the Balkans and received the protection of…
Prince Petar of Serbia seal 9th century with inscription +KÊ R, / ΠÊTPO K,/MICTH KÊ / ARX' CEPBHAC ('Lord, help Petar, caretaker and archon of Serbia')
Emperor Basil I receiving delegations of Serbs and Croats.