Stockholm, 23 October 1956 - Institutional correspondence Ernesto de Zulueta's letter to Alberto Martín-Artajo Álvarez
New York, 20 March 1980 - Internal institutional documents An agreement over the conditions and delivery date of Guernica
Madrid, 6 December 1968 - Institutional correspondence Luis Carrero Blanco's letter to Florentino Pérez Embid
Mougins, 14 November 1970 - Institutional correspondence Pablo Picasso's letter to the New York's Museum of Modern Art
Madrid, 2 December 1975 and Berkeley, California, 8 January 1976 - Institutional correspondence A letter from José Mario Armero to Herschel B. Chip, with reply
Internal institutional documents A communiqué from the Spanish government regarding the delivery of Guernica
Valencia, 27 February 1981 - Institutional correspondence A letter from Manuel García y García to Javier Tusell, dated 27 February 1981
Valencia, 23 June 1981 - Institutional correspondence A letter from Manuel García y García to Javier Tusell, dated 23 June 1981
Paris, June-July 1955 - Institutional correspondence Letters from José Rojas Moreno to Alberto Martín-Artajo Álvarez
Bonn, 16 February 1956 - Institutional correspondence Antonio Mª Aguirre's letter to Alberto Martín-Artajo Álvarez
Brussels, 14 May 1956 - Institutional correspondence A letter from the Spanish ambassador in Belgium to Alberto Martín-Artajo Álvarez
Amsterdam, 6 July 1956 - Institutional correspondence A letter from J. M. Trias de Bes to Alberto Martín-Artajo Álvarez
Oslo, 27 November 1956 - Institutional correspondence A letter from Miguel de Aldasoro to Alberto Martín-Artajo Álvarez
Basauri, 20 December 1979 - Institutional correspondence A telegram from the Etxebarri Town Council to the Ministry of Culture
20 February 1980 - Institutional correspondence A letter from Ricardo de la Cierva Hoces to Adolfo Suárez
New York, 24 March 1980 - Institutional correspondence A letter from Richard Oldenburg and William Rubin to Javier Tusell
Madrid, 28 June 1980 - Institutional correspondence Ricardo de la Cierva Hoces' letter to Javier Tusell
Madrid, 11 September 1980 - Institutional correspondence Javier Tusell's letter to José Pedro Pérez-Llorca
Madrid, 23 and 25 September 1980 - Institutional correspondence Alejandro de Muns' letter to Javier Tusell, with reply
3 October 1980 - Internal institutional documents A confidential letter from Spain's Ministry of Culture regarding negotiations for Guernica
Madrid, 5 November 1980 - Institutional correspondence A letter from Íñigo Cavero to Blanche de Philip P. Weisberg (Blanche Mahler)
1980 - Internal institutional documents Report by the Management Board of Artistic Heritage, Archives and Museums on the moral rights and legislation with regard to Guernica
Madrid, 11 December 1980 - Internal institutional documents Javier Tusell's report on negotiations for the transfer of Guernica
Madrid, 21 October 1981 - Internal institutional documents A technical report on the installation and state of preservation of Guernica
Madrid, 3 September - Institutional correspondence Carlos Robles Piquer's letter to Javier Tusell, dated 3 September
Madrid, 1981 - Photograph Zenithal view of the reproduction of Guernica to test the installation in the Casón del Buen Retiro
Madrid, 1981 - Photograph Placing the reproduction of Guernica for the test installation in the Casón del Buen Retiro
Madrid, 1 June 1981 - Internal institutional documents An internal letter from Javier Tusell to Íñigo Cavero
New York, 8 May 1968 - Institutional correspondence Antonio Serrano's letter to Fernando María Castiella
Madrid, 30 November 1968 - Internal institutional documents The possible recovery of Pablo Picasso's Guernica
Madrid, 21 February 1969 - Institutional correspondence Florentino Pérez-Embid's letter to Joaquín de la Fuente
Madrid, 22 April 1970 - Internal institutional documents Pablo Picasso is awarded the Gold Medal of Merit in the Fine Arts