Balthasar Charles, Prince of Asturias Diego Rodriguez De Silva y Velazquez (1599-1660)

The picture has something of this: wear, people, portrait, royalty, outerwear, retro, man, lid, veil, woman, costume, indoors, child, music, cape.
Perhaps it’s a painting of a young boy in a black outfit with a red chair in front of him and a red curtain in the back of the picture.