We report on the palaeopathology of a medieval skeleton of a young adult male with multiple traumatic fractures found in 1989 in Piazza della Signoria, Florence, Italy. The skeleton presents ante mortem fractures of the right ulna and femur, and left tibia and fibula. We reconstruct the dynamics of the accident based on the location and type of fractures. Then we discuss the impact of this severe trauma on the subject's living conditions based on articular and enthesic modifications of the skeleton. Copyright © 2010 John Wiley & Sons, Ltd.