During Ezio's travels in Constantinople, he encountered a new variety of armor. From blacksmiths, he could acquire Azap leather armor, which was the weakest, followed by Mamluk metal armor and the Sepahi Riding armor in terms of strength.
Additionally, upon initiating the advanced training of seven Apprentices, with the rank of Assassin, into becoming Master Assassins through the first part of their specialised mission, Ezio acquired the Master Assassin armor.
Also, after spending some time in the city and finding all ten of Ishak Pasha's memoir pages, he then journeyed inside the Hagia Sophia and completed a harsh climb to secret room within the mosque, in order to obtain the Armor of Ishak Pasha from the Assassin's tomb.
Ezio's Assassin Apprentices in Rome and Constantinople could also wear armor, which was upgradeable as the Apprentice progressed along the ranks of the Brotherhood.
At first, a recruit started with no armor, but could acquire leather pauldrons, leather greaves, a leather chest guard, and finally a full set of plate armor, which would replace their previous leather pieces.
Once they had obtained the Plate Armor, the recruits would be able to last very long in battle, and were less likely to get killed. On reaching the rank of Assassin however, they would gain new robes resembling that of Ezio's Master robes in
Rome, with Assassins Armor even stronger than Plate Armor. In Constantinople, they would gain robes similar to that of Yusuf, along with the armor of a fully-fledged Assassin.