The Prado’s building was designed before the museum itself existed. In 1785, King Charles III commissioned architect Juan de Villanueva to create a Cabinet of Natural History on Madrid’s new scientific promenade. The neoclassical structure formed part of an Enlightenment program that included the botanical garden and astronomical observatory. War interrupted its completion, and French troops damaged and occupied the building during the Peninsular War. It remained unfinished until Ferdinand VII and Queen María Isabel de Braganza supported a different purpose: a royal museum devoted to painting and sculpture.

The Royal Museum opened in November 1819 with a few hundred Spanish paintings. Its foundation drew on collections assembled by Habsburg and Bourbon monarchs, whose tastes had brought works by Titian, Rubens, Velázquez, and many other artists into royal residences. Displaying these paintings together established a powerful narrative of the Spanish school while revealing its connections to Italy and Flanders. The museum initially belonged to the Crown, and its early galleries reflected royal patronage more than a comprehensive survey of European art.

The collection broadened after the nationalization of the royal museum in 1868 and its merger with holdings from the Museo de la Trinidad in 1872. That museum had received works removed from monasteries and religious institutions during nineteenth-century confiscations. Paintings by El Greco, Murillo, Zurbarán, and other masters entered the Prado through this transfer. Donations, bequests, purchases, and the incorporation of later royal collections further enlarged the holdings. Goya became a central figure because his career connected court patronage, popular life, war, and the emergence of modern art.

Expansion created persistent pressure on Villanueva’s building. Galleries, stairways, and service spaces were repeatedly altered, while many later works moved to other national museums. During the Spanish Civil War, the Prado closed and evacuated major paintings to protect them from bombardment. Works traveled through Valencia and Catalonia and eventually to Geneva under international supervision before returning to Madrid in 1939. The episode demonstrated both the vulnerability of cultural collections during conflict and the logistical possibilities of organized emergency conservation.

A major enlargement designed by Rafael Moneo opened in 2007 around the restored cloister of the nearby church of San Jerónimo el Real. The museum now combines the historic Villanueva Building with additional galleries, conservation areas, archives, and study facilities. Its governing framework gives it administrative autonomy while keeping it part of Spain’s national heritage. The Prado’s identity remains rooted in royal collecting, but scholarship and public display continually reinterpret that inheritance. It is especially valuable as a concentrated record of how European monarchies used painting to express devotion, dynasty, diplomacy, and power.