He was visiting professor at University of Paris I (Sorbonne) in 2006 and University of Rome La Sapienza in 2002–2009. In 2002–2003 he held the Chaire W J Ganshof van der Meersch under the Fondation Philippe Wiener–Maurice Anspach at the Université Libre de Bruxelles.
He held a professorship at the University of Paris I (Sorbonne) in 2006 and the University of Rome La Sapienza from 2002 to 2009. He was also appointed as the holder of the Chaire W J Ganshof van der Meersch at the Université Libre de Bruxelles between 2002 and 2003.