Barbarigo was a Venetian businessman. He married Helena Thopia, the daughter of Albanian magnateKarl Topia, who had ruled as "Prince of Albania" from Durazzo and had since 1386 served as a Venetian vassal. After Karl's death in 1388, Barbarigo inherited the castle of Croia and the surrounding region through his wife. He ruled from the strong fortress of Croia and held the possessions under Venetian suzerainty. After the Ottomans had occupied Scutari, they defeated Demetrius Jonima, who then set up a meeting between Barbarigo and the Ottomans. As Barbarigo had recently quarrelled with the Venetians, and likely felt an Ottoman threat, he accepted Ottoman suzerainty. He had a meeting with Beyazid. He retained Croia and his lands which stretched to Durazzo, and began to plunder Venetian holdings in the vicinity of Durazzo. Venice ordered Niketa Thopia, the governor of Durazzo, to answer the plundering; Thopia heavily defeated Barbarigo. The Ottomans, presumably disappointed, installed their vassal Konstantin Balšić as governor of Croia; Barbarigo was exiled, taking refuge at the court of Đurađ II Balšić, who at the time was also an Ottoman subject. Konstantin soon married Barbarigo's wife Helena, who had the hereditary rights to Croia. In chronicles, Helena is said to have been unfaithful, transferring Croia to her lover, Konstantin. Đurađ II had declined an offer of 1,000 ducats to give up Barbarigo to the Venetians. Afterwards, Đurađ II broke ties with the Ottomans and seized rival Konstantin's stronghold Dagno in 1395, with Venetian assistance. In 1400, Barbarigo attacked Venetian merchant Phillip Barelli on the Cape of Rodon, and wed his wife, after which there is no more mention of Barelli in history. Around 1422, he was appointed overseer of Cattaro. He succeeded Antonio Boccole. Stefan Lazarević, the ruler of the Serbian Despotate, had been ceded Zeta from his nephew Balša III in April 1421, but the Venetians did not recognize him, holding on to the occupied Zetan coast and Bojana, including Drivast recaptured by them after Balša's death. The Venetians had no intention to cede Balša's former possessions to Despot Stefan and even requested Ottoman support in case of an attack. The Second Scutari War followed, which ended inconclusive in August 1423 with the Treaty of Sveti Srdj; in it, Kotor accepted Venetian suzerainty. He was succeeded as governor of Cattaro by Stefano Querini, who held office until 1425. Marco Barbarigo died in 1428.
