A patient, sitting in a chair, is being examined by a physician, he consults with another physician, while a third is examining the contents of a urine flask; an assistant appears to be preparing a treatment. Hans von Gersdorff (1455-1529) was a German surgeon. In 1517, he published Feldbuch der Wundartzney (Fieldbook of Surgery). The book, based on the writings of Guy de Chauliac, served as one of the most basic surgical texts in Europe for a number of years. It was well-known for its advice on limb amputation, of which Gersdorff is reputed to have performed at least 200. Virtually nothing is known about the illustrator, Johann Ulrich Wechtlin.