Featuring some 200 major works by Lucio Fontana, Yves Klein, Piero Manzoni, Piero Dorazio, Jesus Raphael Soto, Jean Tinguely, Gunther Uecker, Jef Verheyen, Arman and other proponents of monochrome painting, Nouveau Realisme, ZERO, Kinetic art, Concrete art and Arte Programmata, the Lenz Schonberg Collection is beautifully documented here.