  Benedict Caetani’s election to the papal see marked a further radical change in his career, as Boniface VIII appointed him archbishop of Bourges in 1295. As a matter of fact, Giles was very often absent from his see, spending extended periods of time at the papal curia. In his De renuntiatione, he defended the legitimacy of Celestine’s abdication, and, consequently, of Boniface’ s election. When the contrast between Boniface VIII and Philip IV reached its most critical point, he continued to side staunchly with the pope. An important sermon defending the papal position has been discovered by Concetta Luna, and Giles’ De ecclesiastica potestate undoubtedly ranks among the sources of Unam Sanctam.