Michael Servetus was a Spanish theologian, physician, and cartographer who lived during the 16th century. He is known for his controversial views on theology, particularly his rejection of the Christian doctrine of the Trinity. Servetus also made significant contributions to the field of medicine, particularly in the study of pulmonary circulation. He was a prolific writer and his works often sparked debate and controversy. Servetus' unorthodox beliefs and writings led to his condemnation as a heretic by both Catholic and Protestant authorities, and he was ultimately executed for his beliefs. Despite his controversial legacy, Servetus is remembered for his contributions to theology, medicine, and cartography.