The “Holy Heads” of Peter and Paul, attested in the 11th century within a secondary altar of the Laurentius-Oratory in the Patriarchium Lateranense and later on inside the main altar of the Sancta Sanctorum, increased their status exponentially after having been transferred by Pope Urban V (1368-70) into the Lateran Basilica. Embedded in two huge, lavishly decorated anthropomorphic...