The 1246 letter of Güyük to Pope Innocent IV — Letter of the Great Khan Güyük Güyük Khan to Pope Innocent IV, Persian version, brought to Europe by John de Carpini.
Photo Credit: By Güyük Khan - Dschingis Khan und seine Erben (exhibition catalogue), München 2005, p. 221, Public Domain, https://commons.wikimedia.org/w/index.php?curid=4223975