Kody do Assassin's Creed II
When you have collected the indicated amount of feathers place them in the chest in Maria's Room at the Villa.
Unlock Condottiero War Hammer:
Collect 50 Feathers, talk to your mother and the Condottiero War Hammer will become available in the blacksmith's shop at Villa Monteriggioni.
Unlock Auditore Cape:
Collect 100 Feathers, talk to your mother and then talk to Mario at Villa Monteriggioni to get the cape.