Woodcut in "De Humanai Corporis Fabrica" by Andreas Vesalius, 1543. Fine art replica giclée print © 2014 Allen Bjorkman. As the Met wrote of its own copy of De humani corporis fabrica: "When Andreas Vesalius (1514–1564) first published his radical De humani corporis fabrica (On the Structure of the Human Body), the ancient texts of Aristotle and Galen were still judged authoritative in the medical schools of Europe. By performing his own dissections, Vesalius discovered errors in the ancient authors' teachings. The De humani corporis fabrica, which drew attention to these flaws, initially threatened the academic medical establishment but ultimately won Vesalius admiration and a post as court physician to Charles V, to whom he dedicated the volume."