Maurizio was originally from
Civitas Nova Heracliana and was a member of the
possessores class. According to
Giovanni Diacono (who was writing in the 10th and 11th centuries), he stood out as an expert in governance. Maurizio's election took place without disputes, and he was raised to the dogeship in
Malamocco in 764. Maurizio was raised to the dogeship at a time when two tribunes were being elected annually to check the power of the doge. His predecessor had been from a pro-
Lombard faction, but Maurizio was a wealthy man from pro-
Byzantine Heraclea. He opposed both the strong republican faction, which supported moving towards
de facto independence, and the pro-Frankish and pro-Lombard factions. He received the titles of
magister militum and
hypatos from the
Emperor Leo IV. During his reign, Maurizio oversaw an expansion of the ducal authority, from a bureaucratic-military function into a more autonomous authority. The Lombard king
Desiderius, in light of the alliance between the papacy and the Frankish king
Charlemagne and the strong clerical support for Frankish hegemony in Venice, ravaged the states of the church and
Istria, even capturing the doge's son
Giovanni. Through the pope, Maurizio sent ambassadors to Charlemagne and his son was released. Maurizio then made the first of many subsequent attempts to create a hereditary dogeship when, in 778, he had his son made a second doge. Maurizio obtained the consent of the emperor of the East for this last act. During Maurizio's final eleven years, the Venetians expanded permanently to the
Rialto islands. On the little island of
Olivolo (now
Castello), he reconsecrated the church of
Saints Sergius and Bacchus as that of
St Peter. It was raised to episcopal status and was the cathedral of Venice throughout the republican era. The low point of Maurizio's reign was the expulsion from the
Pentapolis of Venetian traders for trading in slaves and eunuchs. Maurizio was succeeded by his son on his death. His name, Galbaio, came from his reputed descent from the ancient
Roman emperor Galba. ==Sources==