Il Duomo's Secret: Super simple. The entrance is on the north end of the Basilica Santa Maria del Fiore. It's on street level, and really anyone could open it but only you're smart enough.
In the first hall, wall run up the throne-looking object to the left of the main door and you can climb to the first waypoint. Another waypoint appears on your map and urges you to the far end of the hall. To get there, you'll need to zigzag across the hall using a variety of beams and chandeliers to slowly progress eastward. For more info, watch the whole gameplay.
This is an Assassin's Creed II walkthrough for Tomb 2: Il Duomo's Secret.
Mahalo's Assassins Creed 2 Walkthroughs are more than enough information for you to play the game yourself, and they teach you everything your need to be prepared for when playing yourself. This video walkthrough focuses on Tomb 2: Il Duomo's Secret.
Assassin's Creed 2 by Ubisoft is the action-adventure video game playable on PlayStation 3, Xbox 360, Sony PSP, and Nintendo DS video game consoles, along with Microsoft Windows. It is the direct sequel of Assassin's Creed and revolves around Ezio, and is set in Renaissance Italy. Ezio befriends Leonardo da Vinci, who provides experimental weapons and gadgets, and takes on Florence's most powerful families and ventures throughout the canals of Venice, where he learns to become a master assassin. The Assassin's Creed 2 gameplay is a mixture of action, stealth, and acrobatics.