Napoleon and Marshal Lauriston (Peace at any price). 1899-1900 Vasily Vereshchagin (1842-1904)

The picture has something of this: people, wear, two, portrait, man, woman, lid, royalty, veil, opera, group, theater, three, coat, leader, outfit.
Perhaps it’s a painting of a man in a military uniform standing next to a woman in a white dress and a black hat with a gold chain around her neck.