Brussels, 14 May 1956 - Institutional correspondence A letter from the Spanish ambassador in Belgium to Alberto Martín-Artajo Álvarez
Madrid, 11 December 1979 - Institutional correspondence Marcelino Oreja's letter to Manuel Clavero Arévalo
6 September 1992 - Newspapers The Reina Sofía presents its Collection and becomes the century's museum of Spanish art