There are four capes available throughout the game. Please note that for the Medici and Venetian Cape you need to play Assassin's Creed: Project Legacy on Facebook.

Unlockable	How to Unlock
Auditore Cape - no notoriety	Rome 100% rebuilt.
Borgia Cape - no notoriety	Collect all 101 Borgia Flags.
Medici Cape - purely aesthetic	Complete the Auditore Trail Mnemonic in Assassin's Creed: Project Legacy.
Venetian Cape - purely aesthetic	Complete the Auditore Trail Mnemonic in Assassin's Creed: Project Legacy.