The numbering system for all Pavilions runs clockwise from the point of entry. An alpha-numeric system will be used to identify all rooms.
All ODD numbers are along the inner court. All EVEN numbers are along the outer walls.
For example, room R-320 denotes you are in the Richelieu Wing, third level, twentieth room, outside wall.
D-211 would indicate you are on the second level in the Denon Pavilion, inside wall.