Heart and vessels

Andreas Vesalius, the 16th-century Flemish physician who is considered the father of modern anatomy, was allowed to dissect cadavers at the University of Padua, thanks to a judge who supplied him with the bodies of executed criminals. In his groundbreaking book “The Fabric of the Human Body” (“De humani corporis fabrica”), Vesalius corrected certain errors made by Galen that had been blindly repeated by successive generations of doctors since the second century.

https://www.wsj.com/amp/articles/the-mysterious-origins-of-the-enduring-heart-symbol-1516984378?__twitter_impression=true