The concrete poetry collection of the legendary Bay Area book dealer and collector Steven Leiber--with rare gems from the De Campos brothers, Ian Hamilton Finlay, Bob Cobbing and more MAMCO has devoted a semipermanent exhibition space to concrete poetry since 2016, resulting in the acquisition of a significant group of works falling under this label. This includes the purchase of the Steven Leiber collection. Leiber was a pioneering San Francisco art dealer, collector and gallerist who specialized in the "dematerialized" art of the 1960s and 1970s and the ephemera and documentation spawned by Conceptual art and other postwar movements. The collection features important figures such as Ian Hamilton Finlay, Augusto and Haroldo de Campos, Dom Sylvester Houédard, John Furnival, Maurizio Nannucci, Franz Mon, Ruth Wolf-Rehfeldt, Natalie Czech, Julien Blaine, Jean-François Bory, Pierre and Isle Garnier, Bob Cobbing and Richard Kostelanetz.