XEE4145532 Bal de l\'Opera, Paris, 1860: view of the passage of the Opera, at night, where costume people leave the dance mask. Engraving in ??????Le Monde Illustre??????n簞150 of 25 February 1860. by French School, (19th century); Private Collection; (add.info.: Bal de l\'Opera, Paris, 1860: view of the passage of the Opera, at night, where costume people leave the dance mask. Engraving in ??????Le Monde Illustre??????n簞150 of 25 February 1860.); Stefano Bianchetti.