Leonardo da Vinci (1452–1519) The Virgin of the Rocks, about 1491/2–99 and 1506-8 Oil on poplar, thinned and cradled 189.5 x 120 cm © The National Gallery, London (NG 1093) 'Leonardo da Vinci: Painter at the Court of Milan’ is the most complete display...

The two paintings were almost sold in 1916 in a complex set of dealings between London’s National Gallery and Henry Clay Frick. The two Titians of Diana, Diana and Actaeon and Diana and Callisto, both 1556-59, were nearly sold at the height of World War...

Alfred Sisley, Bridge at Hampton Court, 1874. Wallraf Richartz Museum & Fondation Corboud, Cologne. © Rheinisches Bildarchiv, Cologne. LONDON.- Alfred Sisley (1839–1899) was one of the greatest landscape painters of the 19th century and a leading figure...