In 1537, when he was still only twenty-three, he was placed in charge of anatomy teaching, and it was there, in the course of repeated dissections, that he began to see where Galen had gone wrong. This soon led him to reject Galen entirely and Vesalius began to teach only what he himself had uncovered. This proved enormously popular and students flocked to his lectures, five hundred at a time according to some accounts.51 After five years in Padua and while he was still barely twenty-eight, he produced The Structure of the Human Body, with a dedication to Charles V. Published in Basle, it
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