The Museo del Prado is Spain’s national art museum. Founded in Madrid in 1818 by Ferdinand VII, it features one of the world’s finest collections of European art, much of which came from the royal holdings of the Habsburg and Bourbon monarchs in Spain. In 1872, the Prado acquired many notable works formerly owned by Spanish convents and monasteries. It owns outstanding pieces by El Greco, Diego Velázquez, and Francisco de Goya. What is considered its most famous work on display? Discuss