These paintings from Allan Kaprow never had been seen Allan Kaprow (1927-2006) is internationally renowned mainly as an action artist. Not only did he coin the term Happening--he gave distinction to this art form in New York in the late 1950s. Also his environments--huge, changeable installations, made from material such as car tires, drums and ice blocks - are regarded as milestones in recent art history. Allan Kaprow did, however, began...