Altar of St. Gregory the Great
St. Peter's Basilica
Vatican City
Rome Italy
2016

Altar of St Gregory the Great

The altarpiece is a copy of The Miracle of St Gregory, a painting by Andrea Sacchi (1599-1661).

​Beneath the altar lies a white marble sarcophagus, which contains the mortal remains of Pope Gregory the Great (r. 590-604).

https://www.walksinrome.com/a-guide-to-st-peters-basilica.html

St. Peter’s Basilica is the largest church in the world. It stands above the spot where St Peter is thought to have been buried. The basilica is the second church to have been erected here; the first was built by Emperor Constantine the Great (r. 306-337) between 324 and 329.