"Sol LeWitt: 4 Decades" presents an opportunity to accompany one of the great artists of our time on a tour of his work, from his formative years to the present. ed by curator Gary Garrels, LeWitt offers context and motive behind his 2000 retrospective exhibition at Chicago's Museum of Contemporary Art. A heavy emphasis is placed on LeWitt's spectacularly large scale wall drawings, for which he is best known. Garrels, who with LeWitt, spent three years on the creation of the exhibition, leads the artist through his breakthroughs of four decades, from the 1960s to the present.