Théodore Chassériau – Ali-Ben-Hamet, Caliph of Constantine and Chief of the Haractas, followed by his Escort (Ali Ben Ahmed) Château de Versailles

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