Woodcut monograms by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/466789/free-illustration-image-heart-julie-graag-coupleFree Image from public domain licenseStrawberry Bush; "Hearts Bustin' with Love" (Euonymus Americanus) (1930) by Mary Vaux Walcott. Original from The… https://www.rawpixel.com/image/2621260/free-illustration-image-strawberry-flower-william-morrisFree Image from public domain licenseDies Microcosmicus: Nox Microcosmica. Alchemical chart showing the human body as the world soul. Original public domain… https://www.rawpixel.com/image/8782651/image-art-space-vintageFree Image from public domain licenseCrassula Cordata (Heart–Leaved Crassula) from Histoire des Plantes Grasses (1799) by Pierre-Joseph Redouté.… https://www.rawpixel.com/image/2355080/free-illustration-image-heart-redoute-redouteFree Image from public domain licenseAllegorical Figure of Friendship (recto); Christ on the Cross (verso) by Juan del Castillo https://www.rawpixel.com/image/14247942/image-paper-heart-cartoonFree Image from public domain license