Portrait of an Unknown Man with a Chamberlain’s Key Heinrich Gottlieb Hauser (1720-1751)

The picture has something of this: people, portrait, wear, woman, jacket, Renaissance, opera, veil, lid, queen, costume, dress, cape, necklace, coat, royalty.
Perhaps it’s a painting of a man in a red and gold outfit sitting in a chair with a black hat on his head and one hand in his other hand.