The Entrance Hall (also called the Grand Foyer) is the primary and formal entrance to the White House, the official residence of the President of the United States. The room is rectilinear in shape and measures approximately 31 by 44 feet. Located on the State Floor, the room is entered from outdoors through the North Portico, which faces the North Lawn and Pennsylvania Avenue. The south side of the room opens to the Cross Hall through a screen of paired Roman Doric columns. The east wall opens to the Grand Staircase.