The President's residence and rooms for ceremonies and official entertainment are housed in the Executive Residence. The East Room, Green Room, Blue Room, Red Room, State Dining Room, Family Dining Room, Cross Hall, Entrance Hall, and Grand Staircase are all on the White House State Floor. The White House State Floor's white marble walls complement the vaulted ceiling arching gracefully overhead. Around 1793, architect James Hoban installed the groin vaulting. Its strong construction withstood the 1814 fire. The Center Hall is a large central hallway on the second floor of the White House, which serves as the residence of the President of the United States. It runs from east to west, connecting the East and West Sitting Halls.