Young Man on a Riverbank (recto); Study of a Wagnerian Scene (verso) by Umberto Boccioni https://www.rawpixel.com/image/9086721/image-hat-umberto-boccioni-charcoal-paperFree Image from public domain licenseThree Horses Tended by Men; Stone Pavement (recto); Horses and Figures in a Landscape (verso) https://www.rawpixel.com/image/9086625/photo-image-paper-art-vintageFree Image from public domain licenseUntitled (Schnelligkeit) (Speed) (1914 - 1922) by Umberto Boccioni https://www.rawpixel.com/image/13761881/untitled-schnelligkeit-speed-1914-1922-umberto-boccioniFree Image from public domain license