This new edition analyses the presence of architecture in the Museo Reina Sofía’s Central Archive, a repository of memory containing, in fragments, the history of the institution: its origins as a hospital of neoclassicism, its role during the Spanish Civil War as a field hospital, its transformation into an art centre and its expansion as an international museum. Various landmarks that enable a micro history of civil and public architecture to be traced from the 18th century to the present day, but without losing sight of the process of configuration and the idea of what a museum must be.