In 1785, by decree of Charles III the archives of the Council of the Indies were to be housed here, in order to bring together under a single roof all the documentation regarding the overseas empire, which until that time had been dispersed among various archives, as Simancas, Cádiz and Seville. Responsibility for the project was delegated to José de Gálvez y Gallardo, Secretary for the Indies, who depended on the historian Juan Bautista Muñoz for the plan's execution. Two basic motivations underlay the project; in addition to the lack of space in the "Archivo General de Simancas", the central archive of the Spanish Crown, there was also the expectation, in the spirit of the Enlightenment, that Spanish historians would take up the history of Spain's colonial empire. It was decided that, for the time being, documents evolved after 1760 would remain with their primary institutions.