La Casa Rosada (English: The Pink House) is the executive mansion and office of the President of Argentina. The palatial mansion is known officially as Casa de Gobierno, ("House of Government" or "Government House"). Normally, the President lives at the Quinta de Olivos, the official residence of the President of Argentina, which is located in Olivos, Buenos Aires Province. The characteristic color of the Casa Rosada is baby pink, and is considered one of the most emblematic buildings in Buenos Aires. The building also houses a museum, which contains objects relating to former presidents of Argentina. It has been declared a National Historic Monument of Argentina.

The Casa Rosada sits at the eastern end of the Plaza de Mayo, a large square which since the 1580 foundation of Buenos Aires has been surrounded by many of the most important political institutions of the city and of Argentina. The site, originally at the shoreline of the Río de la Plata, was first occupied by the "Fort of Juan Baltazar of Austria", a structure built on the orders of the founder of Buenos Aires, Captain Juan de Garay, in 1594. Its 1713 replacement by a masonry structure (the "Castle of San Miguel") complete with turrets made the spot the effective nerve center of colonial government. Following independence, President Bernardino Rivadavia had a Neoclassical portico built at the entrance in 1825, and the building remained unchanged until, in 1857, the fort was demolished in favor of a new customs building. Under the direction of British Argentine architect Edward Taylor, the Italianate structure functioned as Buenos Aires' largest building from 1859 until the 1890s.