"Giulio Cesare Casseri (1552 – 8 March 1616), also written as Giulio Casser, Giulio Casserio of Piacenza or Latinized as Iulius Casserius Placentinus, Giulio Casserio, was an Italian anatomist. He is best known for the books Tabulae anatomicae (1627) and De Vocis Auditusque Organis (c. 1600). He was the first to describe the Circle of Willis." - (en.wikipedia.org 15.12.2020)