The White House: President George Washington approved the project, drawn by Irish-born James Hoban, winner of a prize competition, and Pierre Charles L'Enfant, the French architect-engineer, located the mansion in his plan of the federal city. Its construction began in 1792, using light gray sandstone from the Aquia Creek quarries, in Virginia, for the exterior walls. (National Park Service, 2004)
country: America
year: 1970
Yvert: 896a
