Skulls of male and female Capuchin monkeys, with vertical sections. Lithograph by G. Engelmann after C.P. Mazer, ca 1835. https://www.rawpixel.com/image/13970565/image-face-person-artFree Image from public domain license
Ten of Hearts playing card from a pack of transformation playing cards. Vertically, eight figures depicted in bust view… https://www.rawpixel.com/image/9975726/image-face-rose-flowerFree Image from public domain license
Positions of the Hands (1910) from the work of Joseph Gibbons Richardson (1836-1886). Drawings of hand gestures for sign… https://www.rawpixel.com/image/431493/free-illustration-image-sign-language-finger-retroFree Image from public domain license
Interior View of the Academy of Music as Seen from Dress Circle, A. Brown and Company https://www.rawpixel.com/image/9065518/image-art-vintage-public-domainFree Image from public domain license
"Carrefour de St Jean et Paul. Dans l'Opéra Marino Faliero" - Picture of Act II, from the prémiere, at the Théâtre-Italien… https://www.rawpixel.com/image/7666845/image-art-vintage-public-domainFree Image from public domain license
The stages of labour and the vertex positions. Lithograph after W. F. Victor Bonney. https://www.rawpixel.com/image/13986973/image-paper-cartoon-faceFree Image from public domain license