Of what country is XXX a citizen?
Jerzy Kłoczowski
Jerzy Kłoczowski is a former lecturer at the Collège de France (1977), Merton College (Oxford University, 1980), University of Wisconsin-- Madison (1985), Paris-Sorbonne University (1985--1987), Institute for Advanced Study in Princeton (1989--1990), College of Europe in Natolin, Warsaw (from 1997).