Fearing a popular uprising against a Frenchpope, he never went to Rome.
He preached Crusade, but without effect.
He created fourteen new cardinals, including the future popes, Clement IV, Martin IV, and Honorius IV; these appointments insured that the Sacred College firmly supported him, but gave it a French influence that would last over a century.
Instituted the feast of Corpus Christi (the Body of Christ).
While working to increase the civil power and authority of the Vatican, he became embroiled in the dispute over the rightful king of the Two Sicilies, but died before the matter was settled.