Demetrio Progoni (Albanian: Dhimitër Progoni) was an Albanian leader who ruled as Prince of the Albanians from 1208 to 1216 the Principality of Arbanon, the first Albanian quasi state. He was the successor and brother of Gjin Progoni and their father, Progon of Kruja. Following the collapse of the Byzantine Empire in the Fourth Crusade, he managed to further secure the independence of Arbanon and extended its influence to its maximum height. Throughout much his rule he was in struggle against the Republic of Venice, Zeta of Đorđe Nemanjić and later the Despotate of Epiros and inversely, maintained good relations with their rivals, the Republic of Ragusa, and at first Stefan Nemanjić of Raška, whose daughter Komnena he married. The Gëziq inscription found in the Catholic church of Ndërfandë (modern Gëziq) shows that by the end of his life he was a Catholic. In Latin documents, of the time, he is often styled as princeps Arbanorum (prince of the Albanians) and in Byzantine documents as megas archon and later as Panhypersebastos. Under increasing pressure from the Despotate of Epiros, his death around 1216 marks the end of Arbanon as a state and the beginning of a period of autonomy until its final ruler Golem of Kruja joined the Nicaean Empire. The annexation sparked the Rebellion of Arbanon in 1257. He didn't have any sons to continue his dynasty, but his wealth and a part of his domain in Mirdita passed after Demetrio's death to his underage nephew, Progon (son of Gjin), whom he named protosevastos. The Dukagjini family which appeared in historical record 70 years later in the same region may have been relatives or direct descendants of the Progoni.
In historical record, Dhimitër Progoni is the first ruler to call himself Prince of the Albanians and the first to identify his domain as Principatum Albaniae (Principality of Albania/Arbanon). Many later feudal rulers of Albania would lay claim to the same title and present their rule as the continuation of this state. The first to do so was Charles I of Anjou who sought to legitimise the Kingdom of Albania as a descendant state of the Principality of Arbanon about 60 years later, in 1272.
