Amsterdam, 6 July 1956 - Institutional correspondence A letter from J. M. Trias de Bes to Alberto Martín-Artajo Álvarez
London, 1939 - Photograph A speech by Clement Attlee, leader of the Labour Party, on the opening of the exhibition Guernica pictures by Picasso at the Whitechapel Art Gallery
New York, November 10, 1967 - Petition A Call for the Immediate Resignation of all the Rockefellers from the Museum of Modern Art’s Board of Trustees