One of the pioneers and leading exponents of Pop Art, Robert Rauschenberg has experimented with and often blurred the boundaries between a variety of media, such as painting, object art, photography, and print. His mature poster work from the 1970's onwards displays a dynamic technique of composition, often addressing the subject in a surprising, oblique manner. Rauschenberg employs a collage principle that lends and unusual irony to everyday images and photographs.