Light bulbs in a modern building. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298184/free-photo-image-basement-wood-steelFree Image from public domain licenseMr. ZIP standing cut-out (1970) post-man cartoon. Original public domain image from The Smithsonian Institution. Digitally… https://www.rawpixel.com/image/10103604/photo-image-paper-frame-personFree Image from public domain licenseSouth Greenville Recreation Center, Greenville, date unknown, photo by Aaron Hines. Original public domain image from Flickr https://www.rawpixel.com/image/9658727/image-person-public-domain-photoFree Image from public domain licenseSalon Interior (mid–19th century), vintage illustration by A. Redkovsky. Original public domain image from The… https://www.rawpixel.com/image/11063695/image-person-art-watercolorFree Image from public domain license