Leonardo Botallo (1530-1587) and his pioneering contributions to traumatology, cardiology and deontology.

Leonardo Botallo (1530-c. 1587) is widely known for the eponymous "foramen Botalli" and "ductus Botalli". The first, most commonly named "foramen ovale", allows blood in the fetal heart to enter the left atrium from the right atrium. The second, named "ductus arteriosus", consists of a blood vessel in the developing fetus connecting the trunk of the pulmonary artery to the proximal descending aorta. However, Botallo was a multifaceted figure who studied many aspects of human anatomy and physiology, also making important contributions to clinical and surgical practices. Moreover, as we will see in the last section of this paper, Botallo wrote a book on medical deontology having significant features in relationship to the history of medical ethics. Botallo's multidisciplinary approach is a typical characteristic of Renaissance physicians and scientists, who contributed to making this period a fundamental prelude to the scientific revolution of the 17th century.