The work of Hans Haacke (Cologne, 1936) borrows forms, words and styles from systems that appear extraneous to the world of art - from physical and environmental to social and political systems - in order to demonstrate their frequent interdependencies and equivalencies. He appropriates their prevailing meanings, selecting and rearranges them, removing them from their original context and placing them in the new context of a museum or gallery. By focussing on things that are accepted as ordinary occurences commonplace and revealing others that were previously overlooked, he heightens our awareness of ideas.