Hagia Sophia's Secret - p. 2 | Ishak Pasha's memoir pages AC: Revelations Guide
Last update: 11 May 2016
You'll reach another chandelier - jump onto it.
Use the line to slide down.
Now head to the left jumping over the wooden beams and performing a long jump on an object hanging from the ceiling (B during the "flight").
On the other side turn left again and jump on the wooden beam behind the balustrade.
From there climb the wooden scaffolding on the left and then climb the wall on the opposite side of the chamber.
Move along the wall until you reach the golden chandelier.
Jump onto it and then slide down the line.
On the platform you'll find scaffolding. Climb it.
Keep moving to the right.
When the path ends, move a bit higher and jump over the chandelier.
Once you get there, you can jump to the place marked on the map.
After a short cut-scene, jump down to the underground lake.
At its shore you'll find the sarcophagus. The best armor in the game is hidden inside it.
In order to leave the underground, use the grate on the left.