In the upper parts of Saint Peter's basilica (40 meters high) there is the Archivio Storico della Fabbrica di San Pietro (Historical Archive of the Fabric of Saint Peter; Archive Historique de la Fabrique de Saint-Pierre; historische Aufzeichnungen Dombauh黷te von St. Peter). ) where are kept all documents (drawings; plans; bills; contracts ...) relating to the construction of the basilica since the 16th century and located in the upper parts of Saint Peter's basilica (40 meters high)..- In the center is kept a marble relief from the Ciborium of Pope Sixtus IV (1471-1484) (Ciboire du pape Pie IV). This decorative structure covered the Basilica's main altar in the 15th century. The relief is the Crucifixion of Saint Peter.- Since 1523 the Fabric of Saint Peter is an institution of the Roman Catholic Church responsible for the conservation and maintenance of St. Peter's Basilica (basilique Saint-Pierre; Petersdom) and exercising vigilance over its sacred character and the organization of visitors. Saint Peter's basilica. Vatican. 2020.