I suppose you could call the Museo Nacional del Prado Madrid’s version of the Louvre. The museum contains paintings from the 11th - 19th centuries, classical sculptures, drawings, and decorative arts. As one might expect, there’s a heavy dose of Spanish art here, and the Prado’s collection of Spanish paintings from the 11th - 18th centuries is the most thorough in the world. If names like El Greco, Rembrandt, Botticelli, Raphael, Caravaggio, Goya, and Velázquez trip your trigger, then the Prado is for you.
Besides Spanish art, you’ll also see large collections from the Italian, Flemish, Dutch, and French schools. The German collection is smaller. Italian paintings (1300-1800) cover the gamut from the early Renaissance to the eighteenth century. There are also Greek and Roman sculptures.
The part of the museum that seemingly gets the most attention is Hall 89, where Goya’s two paintings The Clothed Maja and The Nude Maja can be found. Not unexpectedly, these two works caused a big scandal in their day, and were deemed to be obscene by the Inquisition in 1815.
For me personally, the most stunning pieces by a wide margin were Goya’s two documentary masterpieces depicting the uprising against occupying French forces on May 2, 1808 and the subsequent executions of the remaining resisters the following day. Both paintings are located side by side in room 39 of the Villenueva Building, and project a powerful message.
In The 2nd of May, 1808 Goya depicts the brutality of war. Local villagers armed with little more than knives clash with members of the well-armed French Calvary.
In The 3rd of May, 1808: The Executions on Principe Pio Hill Goya’s victim, harshly illuminated by a bright lantern, is dressed in a clean white shirt, and his outstretched arms bear resemblance to the Crucifixion. The physical features of the firing squad are obscured, yet their uniforms are painted in precise detail. The silhouette of the church is the only detail visible in the dimly lit background. Interestingly, although the painting was commissioned by the state, it was held in storage and went unseen by the public for forty years after it was painted.

The grounds outside the Museo Nacional del Prado.
Most of the Prado’s collection is not what I’d consider closely aligned with my own personal tastes. But that’s not to say there’s not a lot to like here: I’m a bit of a sucker for Caravaggio, so I enjoyed seeing David and Goliath, and I can appreciate Botticelli’s The Story of Nastagio degli Onesti (first episode). And after all, spending time in Madrid and not seeing the Prado would be like being in Paris and not going to the Louvre or visiting Florence and skipping the Uffizi.
Additional information:
District: Bourbon
Metro: Banco de España (L2), Atocha (L1)