The eastern end of the square is anchored by the Casa Rosada, the pink presidential palace. The characteristic colour dates to the presidency of Domingo Sarmiento, who reportedly had the exterior painted to defuse political tensions by mixing the red of the Federalists with the white of the Unitarians. The building's balconies are the most politically charged in Argentina: it was from here that Eva Perón addressed the masses during the late 1940s and early 1950s — the moment memorialised, and somewhat mythologised, by the Lloyd Webber musical and the 1996 film. The museum at the rear of the palace is free and open Wednesday to Sunday; the building itself can be visited on weekends with a free guided tour.