sentences:  During that same year he collaborated with theoretical physics group at the University of Florence.He crossed the Atlantic in 1969 to do a post-doctoral fellowship at Harvard's Lyman Laboratory of Physics.In 1976 Maiani became a professor of theoretical physics at the University of Rome, however he traveled widely during this period, holding visiting professorships at the Ecole Normale Supérieure of Paris (1977) and CERN (1979–1980 and 1985–1986).