Pope John XXI (1215-1277)
Taught medicine at the University of Siena and wrote a work that became the standard text on logic, used for the next 300 years.
Pope John XXI
January 14th, 2014||
Pope John XXI (1215-1277)
Taught medicine at the University of Siena and wrote a work that became the standard text on logic, used for the next 300 years.