Instructions
Collect all 100 hidden feathers found throughout the game. The majority of feathers are found on top of buildings and ledges at great heights. Activate Eagle Vision to give the feathers a distinctive glow, which makes it easier to find them.
Open the DNA menu to find out which feathers you are missing in any given area. Do not move on to the next area until you have found each of the feathers in your current location. There are 27 feathers in Florence, four in Monteriggioni, 11 in Tuscany, 12 in Romanga and 46 in Venice.
Return to Monteriggioni using the fast travel option once you have collected all 100 feathers. Walk to the north portion of the city and enter the villa.
Walk to your right to enter your mother Maria's room. Interact with the chest next to Maria to place the feathers inside. Walk to Maria and interact with her to receive the Auditore Cape.