Located near the Empress Lodge in Hagia Sophia, the door of Heaven and Hell (Marble Door) is a door made of marble. The door used to separate the west and south galleries.
There are depictions of fruit & fish. The room was used by the priests for their religious meetings. It is said that the room also housed the Synod Council in 1166 and the decisions taken by them were displayed on marble tablets on the walls of outer narthex. (See also Synod Tablets)