Question: what are the 3 museums in the golden triangle of art in madrid
Answer: Prado Museum ( Museo del Prado ) -- a National Museum featuring pre-20th - century art Reina Sofía Museum ( Museo Nacional Centro de Arte Reina Sofía ) -- a National Museum featuring 20th century modern art Thyssen - Bornemisza Museum -- a National Art Museum with a collection of historical through contemporary art , open to the public .