Ali Ben Hamet Caliph of Constantine of the Haractas followed by his Escort 18 Theodore Chasseriau (1819-1856)

The picture has something of this: saint, Renaissance, book, god, baroque, holy, people, Gothic, biblical, interior, virgin, man, baby, veil, incident , cavalry.
Perhaps it’s a painting of a man riding on the back of a brown horse next to a group of men.