Madrid, 9 December 1975 - Institutional correspondence A letter from the general director of Artistic and Cultural Heritage, from Spain's Ministry of General Education
Valencia, 11 March 1937 - Internal institutional documents Report on the Paris International Exhibition
Madrid, 4 February 1988 - Internal institutional documents Reply from Spain's Ministry of Culture regarding the questions put forward by Andrés Ollero in the Congress of Deputies
Madrid, 12 February 1976 - Institutional correspondence A letter from the director-general of Cultural Heritage
Madrid, 16 February 1976 - Institutional correspondence A report from the National Commission of Artistic Heritage on the documents needed to recover Guernica.
12 July 1937 - Manuscript Notes from the speech at the embassy reception, in conjunction with the opening of the Spanish Pavilion
Paris, 10 December 1975 - Institutional correspondence Miguel de Lojendio's letter to Spain's Ministry of Culture
16 February 1976 - Institutional correspondence Report for the National Commission of Artistic Heritage
Madrid, 1981 - Internal museum documents Record sheet of the entry of Guernica into the Casón del Buen Retiro, Madrid
Madrid, 1981 - Internal institutional documents A letter about the exhibition at the Casón del Buen Retiro
Madrid, 31 July, and Cambridge, Massachusetts, 31 August 1981 - Institutional correspondence Álvaro Martínez Novillo's letter to Josep Lluís Sert, with reply