Owens received his PhD in 1951 from the Pontifical Institute of Mediaeval Studies and remained at the Institute as a teacher and distinguished researcher for the rest of his career .
The Pontifical Institute of Mediaeval Studies is an affiliate of the University of Toronto .
Owens received his PhD in 1951 from the Pontifical Institute of Mediaeval Studies , an affiliate of the University of Toronto , and remained at the Institute as a teacher and distinguished researcher for the rest of his career .