Donald Judd was one of the foremost practitioners of Minimal Art and best known for his sleek, boxlike constructions made of industrial materials such as plywood, sheet metal, and plexiglass. Through these works, he sought to create a depersonalized art in which the exploration of space, scale, and materials served as an end, rather than as a metaphor for human experience. Emphatically concerned with pure forms, Judd's works become lucid statements about proportion and rhythm as well as assertions about the displacement of space. His sculptures share rather than invade the observer's space, yet their monumentality often lends them a dynamic presence.