Why Do So Many Rooms in the White House Have an Oval Shape?

Why do so many White House rooms have an elliptical "oval" shape?Taylor Griffin:

The Oval shape of rooms in the White House was chosen to accommodate a formal greeting ceremony known as a "levee." The ceremony has its roots in the royal courts of England and particularly France.

The White House Historical Association explains how it worked in America:

The levee, a tradition borrowed from the English court, was a formal occasion to allow men of prominence to meet the president. Replete with formal dress, silver buckles, and powdered hair, the event was a stiff public ceremony almost military in its starkness. Invited guests entered the room and walked over to the president standing before the fireplace and bowed as a presidential aide made a low announcement of their names. The visitor then stepped back to his place. After 15 minutes the doors were closed and the group would have assembled in a circle. The president would then walk around the circle, addressing each man by his name from memory with some pleasantry or studied remark of congratulation, which might have a political connotation. He bowed, but never shook hands. When he had rounded the circle, the president returned to his place before the mantel and stood until, at a signal from an aide, the guests went to him, one by one, bowed without saying anything, and left the room.

George Washington ordered the bowed walls that characterize the three oval-shaped rooms on the South side of the White House residence: the Diplomatic Reception Room, the Blue Oval room on the State Floor and the Yellow Oval Room on the third floor, expressly for the levee.

But the ceremony was only briefly used. The practice was not loved by John Adams, the White House’s first resident. While Adams accepted the reasoning behind the levee, an efficient way to grant wider access to the president in a manner consistent with his station, he didn't disguise his personal distaste for it. In a letter to his wife Abigail, Adams said simply:

"I hate levees …"

The levee was promptly abolished by Thomas Jefferson, who saw the ritualized grandeur of the ceremony as uncomfortably close to the trappings of monarchy from which the young nation had just fought a revolution to divorce itself. The oval shape nevertheless was reprised in the design of the iconic President’s office when the West Wing was built in 1909. The shape of the Oval Office serves no formal purpose except as a homage to the oval rooms of the White House residence, reinforcing the sense of awe for the power wielded within it.

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