Muhammad Ali v. Floyd Patterson boxing ticket, National Museum of African American History and Culture https://www.rawpixel.com/image/8847841/muhammad-ali-floyd-patterson-boxing-ticketFree Image from public domain licensePoets: twenty portraits of writers. Engraving by J.W. Cook, 1825. https://www.rawpixel.com/image/13985508/poets-twenty-portraits-writers-engraving-jw-cook-1825Free Image from public domain licenseFernando de Contreras contemplating Christ on the cross. Engraving by D. Dragon after F. Preciado de la Vega. https://www.rawpixel.com/image/13996633/image-dragon-face-jesus-christFree Image from public domain licensePortret van kunstenaar Francisco Preciado de la Vega (1752 - 1762) by Antonio Pazzi and Francisco Preciado de la Vega https://www.rawpixel.com/image/13767416/image-paper-face-frameFree Image from public domain license