Miguel Servet (Michael Servetus)

Spanish physician and theologian (c. 1511-1553) whose Christianismi Restitutio (1553) contains a description of the pulmonary transit of blood — against Galen's doctrine of pores in the heart's septum, which he could not find in dissection. Burned at the stake in Geneva in 1553 for his anti-trinitarian theology; only three copies of the book survived.