17. How many Masyaf Keys, needed to unlock Altaïr's library, is Ezio searching for?
From Quiz Arrivederci, Ezio Auditore
Answer:
Five
The first part of the game takes place in Masyaf, and Ezio fights Leandros, a Templar captain, for possession of the journal of Niccolò Polo, which reveals the locations of the five Masyaf Keys. Each key is encoded, if you like, with a memory of Altaïr which Ezio relives. Four of the keys are hidden in Assassin tombs around Constantinople, but the last is in the possession of the Templars, and Ezio hunts down and kills the man who holds it, Manuel Palaiologos, in Cappadocia. Inside the library, Ezio finds the skeleton of Altaïr himself with one final key and one final memory. Shortly afterwards, Ezio relinquishes his life as an Assassin and returns to Constantinople with Sofia.