Portrait of Empress Elizaveta Petrovna Ivan Yakovlevich Vishnyakov (1699-1761)

The picture has something of this: people, wear, dress, woman, portrait, model, princess, girl, veil, royalty, Renaissance, queen, crown, outfit, opera, fashion.
Perhaps it’s a painting of a woman in a white dress with a tiara on her head and a cake on a table in front of a black background.