Iasent Rigaud – Louis de France, Dauphin (1661-1711), known as the Grand Dauphin Château de Versailles

The picture has something of this: sword, weapon, armor, people, helmet, veil, wear, knight, woman, warrior, Renaissance, cape, war, skirmish, man.
Perhaps it’s a close up of a painting of a man in a suit of armor with a sword in his hand and a dog on the other side of the painting.