 Some massive but mostly plain porphyry sarcophagi from the church are now placed outside the Istanbul Archaeology Museums.The Tomb of Antipope John XXIII in Florence is a grand Early Renaissance wall tomb by Donatello and Michelozzo; although classical in style, it reflects the somewhat inharmonious stacking up of different elements typical of major Gothic tombs.It has a life-size effigy, also known as a gisant, lying on the sarcophagus, which was common from the Romanesque period through to the Baroque and beyond.