Louis XVI (1754-93) in Coronation Robes Joseph Siffred Duplessis (1725-1802)

The picture has something of this: sculpture, people, veil, statue, god, wear, decoration, church, spirituality, gold, temple, woman, ancient, museum, seat.
Perhaps it’s a painting of a man in a white outfit sitting in a chair with a golden chain around his neck and a white dog standing next to him.