Horse in New Forest National Park, Lyndhurst, United Kingdom. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283844/free-photo-image-horse-animal-animals-images-picturesFree Image from public domain licenseTetradrachm (Coin) Portraying Alexander the Great by Ancient Roman https://www.rawpixel.com/image/8960063/tetradrachm-coin-portraying-alexander-the-great-ancient-romanFree Image from public domain licenseChing Poy, Kwangtung province, China. Photograph by John Thomson, 1871. https://www.rawpixel.com/image/14015294/ching-poy-kwangtung-province-china-photograph-john-thomson-1871Free Image from public domain licenseChing Poy, Kwangtung province, China. Photograph, 1981, from a negative by John Thomson, 1871. https://www.rawpixel.com/image/13995314/photo-image-plant-tree-skyFree Image from public domain license