Correspondence from José Domingo de Mazarredo y Gortazar (Naval Ensign of the Royal Navy. Full Member) addressed to the Count of Peñaflorida
Correspondence from José Domingo de Mazarredo y Gortazar (Naval Ensign of the Royal Navy. Full Member) addressed to the Count of Peñaflorida
Document containing the marriage contract of Antonio María de Munibe Aréizaga and Josefa Joaquina de Aranguren Álava, descendants of two prominent 18th century families of the Royal Bascongada Society of Friends of the Country.
Spanish translation of the work: Uso de la aritmética política en el comercio y rentas reales
Work entitled: History and the benefits of its study, proposed to a prince
Document containing the marriage contract between Francisco Javier María de Munibe, 10th Count of Peñaflorida, and María Josefa de Areizaga
Document containing a political dissertation on the education that the students of the Royal Seminary of Vergara should receive
Correspondence from Luis Proust, Professor of Chemistry at the Royal Seminary of Vergara, to Xavier María de Munibe
Document containing the Statutes of the Real Sociedad Bascongada de los Amigos del País, an institution founded in 1765 in Azkoitia by the Count of Peñaflorida.
Document containing a list of the members of the Real Sociedad Bascongada de los amigos del Pais from its foundation in 1765 until 1779
File of information and passenger licence to the Indies of the scientist Juan José de Elhúyar to work in an American mine