Ravenna dedicated to Saint John the Evangelist (San Giovanni Evangelista) was also built by Galla Placidia after 425; it commemorated the augusta's and her children's deliverance from a threatening storm during a sea-voyage and was adorned with portraits of her and other members of the Theodosian dynasty. The basilica did not survive the Second World War. According to the mediaeval Liber Pontificalis Ecclesiae Ravennatis, an inscription on the apse of that basilica recorded the buildings status as an ex-voto in gratitude for Galla Placidia's survival at sea. The Liber Pontificalis also claims her burial was at the monasterium of Saint Nazarius at Ravenna. This claim, originally probably made in Rome, is the probable origin of the misconception that Galla Placidia was buried in Ravenna, rather than in Rome, which culminated in the Ravennates' claim that she was buried in the chapel now known as her "mausoleum". The building was formerly the oratory of the Church of the Holy Cross and now contains three sarcophagi. The sarcophagus to the right is attributed to Galla's brother, Emperor Honorius. The one on the left is attributed to her husband, Emperor Constantius III, and her son, Valentinian III. The largest sarcophagus was thought to contain the remains of Galla Placidia herself. Her embalmed body was reportedly deposited there in a sitting position, clothed with the imperial mantle, and visible through a peep-hole. In 1577, however, the contents of the sarcophagus were accidentally burned when children inserted a lighted taper. The mausoleum was once connected to the narthex of Santa Croce, but now in ruins. Architecture and decoration The mausoleum is laid out in a cruciform floor plan, with a central dome on pendentives and barrel vaults over the four transepts. The exterior of the dome is enclosed in a square tower that rises above the gabled lateral wings. The and decorated with blind arcades. Light enters through window panels. The interior of the mausoleum is covered with rich mosaics. The inside contains two famous mosaic lunettes, and the rest of the interior is filled with mosaics of Christian and Apocalyptic symbols. Mosaics composed of glass tesserae cover the interior walls of the vault, the lunettes and the cupola; the adornments are of high quality. Above the entrance portal is a mosaic depicting Christ as the Good Shepherd among his flock. The barrel-vaults of the four arms of the cruciform chapel bear vegetal mosaics consisting