Come along and see 84 works: watercolours and oils from the Tate Gallery and other British and American collections. J.M.W. Turner (1775-1851) is rightly seen as one of the forerunners of Impressionism. This is his first show in Poland and a big deal; it was on the main news when it was announced. The subjects are sunrises, sunsets, the sea in different weather and how all these interact with light. He was a revolutionary and if you don't know him well, this is a great chance to right that wrong.