cardinal coat of arms from the ceiling of the church of san marcello al corso. rome, italy,

affresco architecture arms art basilica building cardinal cardinalpriest cardinalprotector catholicism ceiling christianity church coat corso decoration emblem fresco from fuori gold golden gregorio gregory holds icon indoor intermediary italian italy keys landmark marcello normally ornamental ornate outside paolo papa papal paul pope rank religion roma roman rome saint san sculpture shield stucco symbol tiara titular vatican vault walls whose xvi