From 1819 until his death in 1851, he worked as a professor at the University of Bonn.

He was a full professor at the University of Bonn, from 1936 to 1969.

From 1893 to 1910 he was a professor at the University of Bonn.

Since 1997 he is professor at the University of Bonn.

He had held a post at Bonn University since 1823.

From 1864-66 he attended a language course at the University of Bonn.

He studied law at the University of Bonn from 1980 to 1987.

He holds a chair at the University of Bonn since 2003.

The University of Bonn has 525 professors and 27,800 students.

At the same time, the University of Bonn was founded.