An early 20th-century power station turned into an arts complex by Swiss architects Jacques Herzog and Pierre de Meuron—who also transformed a factory into London's Tate Modern—is the fourth vertex in what was formerly Madrid's triangle of great art institutions—the Prado, the Reina Sofía, and the Thyssen-Bornemisza museums. The Caixa belongs to one of the country's wealthiest foundations (La Caixa), and seems to float on a newly created sloped public plaza, with a tall vertical living garden designed by French botanist Patrick Blanc on its northern side. Inside, the huge exhibition halls display ancient as well as contemporary art, including a sample of La Caixa's own collection. There's a cafeteria on its fourth floor.
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