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In Washington, D.C., the cornerstone of the United States Executive Mansion (known as the White House since 1818) is laid.
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White House
Official residence and workplace of the US president
The White House is the official residence and workplace of the president of the United States. Located at 1600 Pennsylvania Avenue NW in Washington, D.C., it has served as the residence of every U.S. president since John Adams in 1800 when the national capital was moved from…Source: Wikipedia (CC BY-SA)