Whistler was the first great international American artist, hugely well travelled, a painter and printmaker who bridged the gap between Impressionist Paris and symbolist London. He was an intelligent and original artist who radically proclaimed that art rather than documenting the visual world around us - should be experienced for its own sake. His Arrangement in Grey and Black, a portrait of Whistler’s mother, is one of the great portraits in the history of art, not least for its elusive title. Whilst his Nocturne Black and Gold, was thought so radical that Whistler had to go to court to defend it.