Robert Klippel AO (1920-2001) was the most significant sculptor Australia has yet produced. He joined the Royal Australian Navy in 1939, and spent the war constructing model aircraft and ships designed to educate his fellow-servicemen in the recognition of enemy craft. After the war he studied sculpture in Sydney and London, and his 'assemblages' - sculptures that combined mechanical objects with organic materials - attracted enthusiasm in Europe. Klippel moved to the USA in 1957, and spent a decade teaching sculpture there. He then returned to Sydney, where he lived and worked until his death. In 2001 alone he made more than thirty sculptures. He was collaborating on a major retrospective show of his works when he died on his 81st birthday.