https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14009903
A performance by the "three-headed nightingale" (supposedly a woman with three heads), seen from the side, revealing the trick whereby the appearance of three-headedness was achieved. Reproduction of wood engraving by E.A. Tilly.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use