The House of Barbarigo were a Venetian family of nobles during the late 15th century. Several members of the family, including Emilio, Marco, and Silvio Barbarigo, pledged their allegiances to the Templar Order, as did some of their allies.
As early as 1476 the Barbarigo family had been affiliated with the Templars, with members of the family regularly attending Templar meetings in Rome, during one of which they expressed worry over the Assassin Giovanni Auditore da Firenze.
The Barbarigo remained with the Templars after the execution of Giovanni Auditore and two of his sons, and following the failure of the Pazzi family to overthrow Lorenzo de' Medici of Florence, and assume control of the city in the name of the Knights Templar. The Grand Master of the Order – Rodrigo Borgia – approached the Barbarigo family with an offer seemingly too good to refuse.
Despite the death of Emilio Barbarigo at the hands of Ezio Auditore da Firenze, the son of Giovanni, in 1485, the Barbarigo family remained steadfast. That same year, following the assassination of Doge Giovanni Mocenigo by the Templar Carlo Grimaldi, Marco Barbarigo assumed the title of Doge; a point of much contention among his fellow Templars. With Venice under Templar control, the Barbarigo's were able to utilize the entire city's vast resources in their mission to regain the Apple.
The joyous time was short-lived however; Marco was assassinated during the Venetian Carnevale, and replaced by his brother Agostino – a friend of the Assassins. Not long afterwards, Ezio sided with the Venetian Mercenary guild and assaulted the city's military district, which had remained under the control of Silvio and his servant Dante Moro. As the condottiero Bartolomeo d'Alviano distracted the Templar soldiers, Ezio managed to sneak into Arsenale di Venezia and eliminate Silvio and Dante; ending the Templar presence amongst the Barbarigo family.