"Harry saw the look of mingled fear and surprise on his godfather's wasted, once-handsome face as he fell through the ancient doorway and disappeared behind the veil, which fluttered for a moment as though in a high wind, then fell back into place." (OP36)
The Death Chamber is a room in the Department of Mysteries dominated by a free-standing archway on a raised platform, used to study the mysteries of death. It is located on Level Nine of the Ministry of Magic (OP34).
This room quite large and also rectangular (OP36). It is dimly lit. In the center is a sunken stone pit some twenty feet deep. Stone benches run all around the room and descend in steep steps toward a raised stone dais in the centre of the pit. An ancient, crumbling stone archway, unsupported by any surrounding wall, stands on this dais. This archway is hung with a tattered black curtain which flutters very slightly as though it had just been touched, although the air in the room is still and cold. Some people can hear voices throught the veil; it would seem that those who have lost loved ones are the ones who can hear voices, but this has not been stated specifically (OP34).