Thyssen-Bornemisza National Museum

9 Best Museums in Madrid | Condé Nast Traveler

"The Museo Nacional Thyssen-Bornemisza, once an aristocratic mansion, falls somewhere between the avant-garde works at the Reina Sofia and the traditional Spanish art at the Prado . With an enormous collection of European art from the continent’s most respected masters, the museum is a must-see for anyone. Expect recognizable pieces from the likes of Dalí, El Greco, Monet, Picasso, and Rembrandt. Some works date back to the Medieval period; others are from the 20th century. There are even some 19th-century American paintings as well as interesting modern pop art." - Ramsey Qubein