He returned to France in 1960 to become a philosophy professor at the University of Clermont-Ferrand. In the mid-1960s, Foucault moved with his lover to Tunis (in North Africa), and got a job teaching at the University of Tunis. In 1966 he published "Les Mots et les choses" (The Order of Things), which was very popular. In 1968 he returned to France, where he published "L'archéologie du savoir" (The Archaeology of Knowledge).