LeWitt (American, 1928-2007) was pivotal in the creation of the new radical aesthetic of the 1960's that was a revolutionary contradiction to the 'Abstract Expressionism' current in the 1950's and 60's New York school. He had no interest in inherent narrative or descriptive imagery. LeWitt, like no other artist of his generation, had always maintained the importance of the concept or idea and, apart from his original works on paper, the work is executed by others to clear and strict instructions. As one of the first coherent proponents of conceptual art with his writings, Sentences on Conceptual Art, 1969, LeWitt's work continues to be regarded and referred to by a younger generation of artists as one of the seminal investigations into 'idea' and 'concept' art.