Crownprince, Le Dauphin, Louis-Joseph-Xavier-François of France Adolf Ulrik Wertmüller (1751-1811)

The picture has something of this: child, people, portrait, wear, baby, girl, son, dress, cute, princess, retro, aura, doll, sculpture, lid, museum, woman.
Perhaps it’s a portrait of a young boy in a purple dress with a red rose on his collar and a star.