Chang and Eng the Siamese twins, one holding a book. Lithograph. https://www.rawpixel.com/image/13982122/chang-and-eng-the-siamese-twins-one-holding-book-lithographFree Image from public domain licenseZelfportret voor de ezel (1854 - 1914) by Albert Neuhuys 1844 1914 https://www.rawpixel.com/image/13787612/zelfportret-voor-ezel-1854-1914-albert-neuhuys-1844-1914Free Image from public domain licensePortrait of Magdalena de Cuyper (c. 1635 - c. 1636) by Jacques Jordaens https://www.rawpixel.com/image/13742190/portrait-magdalena-cuyper-c-1635-1636-jacques-jordaensFree Image from public domain license