In 1997 and 2006, he was Visiting Professor at the Collège de France; in 2004, he was Martha Whitcomb Visiting Professor at Harvard, 2016/17 Guest Scholar at the Getty Research Institute at Malibu, California.
Pada tahun 1997 dan 2006, ia menjadi Profesor Tamu di College de France; pada tahun 2004, ia menjadi Profesor Tamu Martha Whitcomb di Harvard, 2016/17 Sarjana Tamu di Getty Research Institute di Malibu, California.