Portrait of Anne Garbett (c.1773-1818) Lady Romilly John Hoppner (1758-1810)

The picture has something of this: veil, woman, people, portrait, queen, crown, wear, jewelry, dress, baroque, princess, Renaissance, girl, royalty, fashion, model.
Perhaps it’s a painting of a woman in a black dress sitting in front of a red curtain and looking off to the side with a serious look on her face.