During a few decades of dramatic social change and optimism, artists in Montevideo, Buenos Aires, Sao Paulo, Rio de Janeiro and Caracas developed a new concrete language independent of representative imagery. Concrete Matters presents some 70 works from the mid-1930s to the 1970s by artists who developed concrete art. It highlights the Brazilian neo-concrete movement, with artists such as Lygia Clark, Willys de Castro and Helio Oiticica, and also includes works by Max Bill, Aluisio Carvao, Waldemar Cordeiro, Carlos Cruz-Diez, Geraldo de Barros, Willys de Castro, Gego, Judith Lauand, Raul Lozza, Gyula Kosice, Tomas Maldonado, Juan Mele, Juan Molenberg, Alejandro Otero, Lygia Pape, Rhod Rothfuss, Luiz Sacilotto, Mira Schendel, Ivan Serpa, Jesus Soto, Joaquin Torres-Garcia and Anatol Wladyslaw. The selection draws on the Coleccion Patricia Phelps de Cisneros.