Porphyry Baptismal Font
Photo © David Joyal / Art History Images. All rights reserved.

Porphyry Baptismal Font

Baptistery just inside the entrance to the basilica, where a porphyry cover from a 4th-century sarcophagus is reused as the baptismal font. It previously covered the tomb of emperor Otho II (973-983) in the Vatican Grottoes.