Byzantine Reliquary Cross

Byzantine Reliquary Cross is a treasure in Uncharted 3: Drake's Deception found in The Citadel.

After using the scope to find the three columns, Cutter and Drake will be ambushed by agents. After killing them all (with Sully's help on the rocket launcher) enter the recently created hole in the wall. Before climbing the wall, turn around to face the entrance to see the treasure on the floor.