Hardly an art programme in the 20th century has renewed itself since its first appearance so much in ever new manifestations and been received until now so constantly and favourably by public and private collections, and by the art market, as the constructive concrete art. How it fired the enthusiasm of gallery owners, collectors and art critics is documented in this sediment edition, as it introduces important galleries and their work with this art form. Interviews as well as images and text documents describe key moments in the involvement with this liberated art.