The National Palace, or "Palacio Nacional", located in Mexico City's main square, the Plaza de la Constitución (El Zócalo), first built in 1563, is in the heart of the Mexican capital. In 1821, the palace was given its current name and the executive, legislative, and judicial branches of government were housed in the palace; the latter two branches would eventually reside elsewhere. During the Second Mexican Empire, its name was changed, for a time, to the Imperial Palace. The National Palace continues to be the official seat of the executive authority, though it is no longer the official residence of the President.