221/500. Edition, signature in pencil and in pen lower right. Title and year in stamp lower left. Plura Editions, Milan.The Superstudio group, founded in Florence in 1967 and made up of Adolfo Natalini, Cristiano Toraldo di Francia, Roberto Magris, Piero Frassinelli, Alessandro Magris, with Alessandro Poli from 1970 to 1972, was active until 1978 and carried out experimental research. and theoretical on design. With the Histograms of Architecture, Superstudio completed the path of antidesign, in which mental diagrams free from models and imitations are represented.