Rokotov, Fyodor Stepanovich – Portrait of Catherine II (2) Hermitage ~ part 10

The picture has something of this: woman, costume, veil, wear, people, dress, portrait, fashion, theater, princess, opera, sword, jewelry, model, queen, fantasy, performance.
Perhaps it’s a painting of a woman in a blue and white dress sitting in a chair with a feathered shawl on her head and a red curtain in the background.