Expo: 10/4/2018 - 5/8/2018, Museo Nacional del Prado, Madrid - 8/9/2018 - 13/1/2019, Museum Boijmans Van Beuningen. Peter Paul Rubens (1577-1640) is the most important painter of sketches in the history of European art. His Italian and Flemish predecessors had for the most part prepared their paintings by using drawings. Rubens transformed this process by systematically making sketches in colour, with oil paint, and nearly always on panel supports. Rubens's oil sketches were essentially a ne...