During his Cardinalate he attended the Conclaves of conclave of 1655, 1667, 1669-70, and 1676 which elected Popes Alexander VII, Clement IX, Clement X and Innocent XI respectively. He was a member of the Squadrone Volante, a group of independent cardinals without allegiance to any particular national interest be it France or Spain. As such, they were able to exercise a good deal of influence in the election of a successor pope. They were therefore courted by both sides.