He was appointed professor of European literature three years later at the same university.

He was however appointed professor emeritus at the same university in 1974.

In 1798, he was appointed professor of mathematics and astronomy at the University.

In 1837 he was appointed director of surgical and pharmaceutical studies at the university.

He was appointed professor at the university in 1965.

He later was appointed a professor at the University of Rome.

In 1963 he was appointed professor at the University of York on its founding.

In 1941, he was appointed to the faculty at the University of Pennsylvania.

In 1914, he was appointed exchange professor at the University of Berlin.

Two days after the marriage he was appointed professor in canon law at the university of Leuven.