This exhibit was among the list of first to utilize laser beams illuminating a setting up and remains to be utilized most weekends. Other well-known exhibits involve "7000 Eichen" by German artist Joseph Beuys which experienced A huge number of oaks planted around the city and "The Parthenon of Publications" https://devinyfjnr.celticwiki.com/800095/pflegedienst_prime_med_in_kassel_for_dummies