The Prado and the Reina Sofia are must-see museums when in Madrid, but the often overlooked Lázaro Galdiano Museum (Museo Lázaro Galdiano) has been called “the best kept art secret” in the city. The elegant mansion housing the collection was once the home of José Lázaro Galdiano, a 19th-century Spanish publisher, entrepreneur, and art collector. Galdiano gifted his exquisite collection of almost entirely Iberian art — including works by Goya, El Greco, Velazquez, Zurbarán, and Murillo — to the state upon his death in 1947.

Today it is an impressive display of more than 13,000 works of art ranging from sculpture and furniture to jewelry and ceramic, among some of Madrid’s finest paintings. You’ll also find the work of French, Italian, and English painters on the second floor. The room dedicated exclusively to Goya’s work is particularly special, though the house itself with its fresco ceilings and magnificent ballroom is worth a visit alone.