Marcus Furius Camillus, d.c.365 BC and Brennus fl.c.389 BC Sebastiano Ricci (1659-1734)

The picture has something of this: people, saint, group, man, Renaissance, god, book, veil, sword, cross, wear, pain, cavalry, holy.
Perhaps it’s a painting of a group of people standing in front of a building with a man on a horse in the foreground and a man.