The term Unnamed Prince of Serbia (Serbian: неименовани српски архонт / neimenovani srpski arhont), or the Unknown Prince (Serbian: непознати кнез / nepoznati knez), refers to the Serbian prince from the first half of the 7th century, who according to the De Administrando Imperio (10th century CE) supposedly led his people from their original homeland in White Serbia, to settle in the Balkans during the reign of Byzantine Emperor Heraclius (610–641), as mentioned in Emperor Constantine VII's work De Administrando Imperio (written in 950s). The work does not record his name, but states that he was the progenitor of the first Serbian dynasty (known in historiography as the Vlastimirović dynasty), and that he died before the arrival of the Bulgars (680), succeeded by his son, and then grandso