Christo and Jeanne-Claude
"The Wall" was organised as part of the IBA Emscher Park, at a cost of nearly 4 million DM. It was an installation by Christo and Jeanne-Claude, consisting of a stack of 13,000 oil drums in 7 colours, 68m wide, 26m high, and 7m deep, and weighed 234,000 kg. It attracted 390,000 visitors.