Guernica is a large 1937 oil painting by Spanish artist Pablo Picasso. It is one of his best-known works, regarded by many art critics as the most moving and powerful anti-war painting in history. It is exhibited in the Museo Reina Sofía in Madrid. Pablo Picasso, 1937 — painted at 56. Canvas and oil paint. 349 × 776 cm. In the Museo Nacional Centro de Arte Reina Sofía. Cubism. Wiki link