Three Sketches: Fortitude, a Sandal, and Grotesques (recto); Sketches of Grotesques, and Roman Cuirass (verso) by Unknown https://www.rawpixel.com/image/9017364/image-paper-person-artFree Image from public domain licenseA woman holding a sword and the scales of justice; representing jurisprudence. Engraving by E. Delaune, ca. 1560. https://www.rawpixel.com/image/14004988/image-paper-cartoon-faceFree Image from public domain licenseThe god Apollo holding his bow and an arrow. Engraving by E. Delaune, ca. 1560. https://www.rawpixel.com/image/13972282/the-god-apollo-holding-his-bow-and-arrow-engraving-delaune-ca-1560Free Image from public domain licenseA woman looking through a level and holding a ruler and compasses, standing in front of a grid; representing perspective.… https://www.rawpixel.com/image/14002042/image-paper-grid-cartoonFree Image from public domain license