
The Serbian ruler was titled " archon of Serbia". The exact borders of the early Serbian state are unclear. These were all situated by the Adriatic and shared their northern borders (in the hinterland) with baptized Serbia. Constantine VII in DAI does not provide a sufficient basis for a reliable conclusion about the origin of the Slavic inhabitants of Duklja. and the "land" of Duklja which was held by the Byzantine empire though it was presumably settled with Serbs as well. The other Serb-inhabited lands, or principalities, that were mentioned included the "countries" of Paganija, Zahumlje, Travunija. Īccording to the DAI, "baptized Serbia", known erroneously in historiography as Raška ( Latin: Rascia), included the "inhabited cities" ( kastra oikoumena) of Destinikon, Tzernabouskeï, Megyretous, Dresneïk, Lesnik and Salines, while the "small land" ( chorion) of Bosna, part of Serbia, had the cities of Katera and Desnik. His account on the first Christianization of the Serbs can be dated to 632–638 this might have been Porphyrogenitus' invention, or may have really taken place, encompassing a limited group of chiefs and then very poorly received by the wider layers of the tribe. Porphyrogenitus stressed that the Serbs had always been under Imperial rule. Slavs invaded and settled the Balkans in the 6th and 7th centuries. 610–641), and was said to have died long before the Bulgar invasion of 680. He received the protection of Emperor Heraclius (r. The work mentions the first Serbian ruler, who is without a name but known conventionally as the " Unknown Archon", who led the Serbs from the north to the Balkans. The DAI drew information on the Serbs from, among others, a Serbian source. The history of the early medieval Serbian Principality and the Vlastimirović dynasty is recorded in the work De Administrando Imperio ("On the Governance of the Empire", DAI), compiled by the Byzantine Emperor Constantine VII Porphyrogenitus ( r. View of the highland part of the Stari Ras complex
