Unknown artist – De mis van de heilige Gregorius, 1500 Rijksmuseum: part 3

The picture has something of this: god, saint, book, people, church, cross, holy, temple, gold, religious, aura, fresco, altar, interior, priest, symbol, spirituality.
Perhaps it’s a painting of a group of people sitting at a table with a priest in front of them and a priest standing at the end of the table.