The building assigned in 1918 was provisional, and it was the low floor of the Dean's house, Benigno Rodríguez Pajares, in the plazuela de la Corrada del Obispo. From this moment the library, the archive and the collection of pieces of the museum remained there with restricted access; this situation propitiated the fact that the building did not suffer extreme damage by the violent attacks of the Revolution of October, in 1934 and the Civil War. In 1939, the Deputation took care of the reconstruction and restoration of the building of the Benedictine Monastery of Saint Vicente, the final site for the Museum, with a work commissioned by the architect Luis Menéndez-Pidal.