White House
The White House, located in Washington, D.C., was the residence of the President of the United States and a seat of the American government.
The President's main office in the White House was known as the Oval Office.
The renegade Time Lady once shared breakfast with President Abraham Lincoln on the White House lawn in the 1860s, after saving the United States from "Martian invaders" for the third time. She told George Strangeways that they had "such a laugh." (IW: The Panda Invasion)
In 1969, the Eleventh Doctor landed his TARDIS in the Oval Office of the White House, where he met President Richard Nixon. (TV: The Impossible Astronaut)
On Christmas Day 2009, President Barack Obama was giving a speech from the White House when, like everyone else on the planet, he was converted into a copy of the Master. (TV: The End of Time)
During the Orion War of the late 26th century, the President of Earth was based in the White House. (AUDIO: Scorpius, AUDIO: Fear, AUDIO: Conversion) In the year 4041, the President of Earth was still based in the Oval Office. (COMIC: Return of the Klytode)