 He returned to Rome in 1226, undertaking negotiations with the cities of the Lombard League.After the death of Honorius III on 18 March 1227 he was appointed a member of a triumvirate of cardinals chosen to select the new pope the next day, and as a matter of courtesy was offered the papacy, which he refused out of concern he would be accused of self-aggrandisement.He died at Bari later that year and was buried, according to his own wishes, in the abbey at Clairvaux.