Antonio de Magianis (1443 – unknown) was the leader of the Thieves Guild located in the Italian city of Venice and a member of the Italian Brotherhood of Assassins during the Renaissance. Raised in poverty from birth, Antonio was unable to attain a wealthy lifestyle, eventually resulting in his founding of the Venetian Thieves Guild. Targeting the rich and wealthy of the city's population, Antonio also improved his position in the Assassin Order, realizing that members of the Templar Order had dug their way into Venice's corrupt nobility.