Marco Barbarigo
Marco Barbarigo (1413-1485) is the cousin of Silvio Barbarigo, the older brother of Agostino Barbarigo and secretly a Templar. He belongs to a rich and powerful family. A tyrant since a young age, Marco was used to getting whatever he wanted.
Marco's wife, Carlotta, was previously married to his personal bodyguard and close friend Dante Moro. Marco orchestrated an attempt on Dante's life, which failed to kill him, but lead to brain damage, leaving Dante Moro with the mind of a child. Later, Marco had Dante annul the marriage and Marco hires Dante as his personal bodyguard.
Assassin's Creed II
Marco and Dante are first seen at a meeting in Venice with Silvio and Carlo Grimaldi. The meeting oddly takes place outside in broad daylight where anyone can hear and follow them (they are walking all over Venice). Marco also informs Silvio and Carlo of his cousin Emilio's death at Ezio Auditore's hands. They are followed by Ezio throughout the entire meeting (unbeknown to them). They plot to kill the current Doge so that Marco can take his place and take control of the Venetian fleets. Their plan works as the Doge is poisoned by Carlo Grimaldi and dies shortly afterward. A few years later, Ezio returns to Venice to kill Marco where it is learned that he never leaves the palace for any such reason at all except during Carnevale (which coincidentally starts the same day Ezio returned to Venice). After completing the games and acquiring the Golden Mask, Ezio sees Marco on a barge making a speech. He is then, supposedly, killed by Ezio using his newly-acquired Hidden Gun, though the player can choose other ways to assassinate him.
Final Words
thumb|300px|left|Database Entry Marco: No, it's too soon. I'm not ready.
Ezio: We rarely are. Che la morte non sia crudele. (Death be not unkind.) Requiescat in pace. (Rest in peace.)
Trivia

- In Assassin's Creed: Lineage, Marco Barbarigo is portrayed by Frank Fontaine who is 90 years old.