The term 'Painter of Haystacks' is a reference to the French Impressionist painter Claude Monet (5 letters). Monet is best known for his series of paintings depicting haystacks in different light and weather conditions. He painted these haystacks in the fields near his home in Giverny, France, from 1890 to 1891. Monet's haystack paintings are considered some of the most iconic works of the Impressionist movement.