This refers to a man variously known as Narcissus Parthenopeus or Vertunus, Narciso Verdú, Verdum, or Vertunno, 1491-1551, a Neapolitan physician to whom Vesalius dedicated his Tabulae anatomicae sex, wrongly thinking this would ingratiate him to the Emperor. Vertunno’s position as imperial archiater or protomedicus was largely honorific, however, and he rarely came in contact with the Emperor. See O’Malley 1964, pp. 84, 431 n. 45. The 1555 edition omits any mention of Vertunno.