Ottobuono de' Fieschi, Pope Adrian V

Ottobuono de' Fieschi (c. 1205–1276), son of Tedisio Fieschi of Lavagna, became a papal chaplain and in 1251 was made Cardinal Deacon of San Adriano by his uncle Pope Innocent IV.

Clement IV sent him to England in 1265 to reconcile Henry III with his barons and preach the Crusades, and he stayed until 1268. In 1268 he issued canons that became a foundation of English church law.

Elected pope as Adrian V in July 1276 through Charles I of Anjou, he died at Viterbo that August, unordained, after only thirty-eight days, having suspended Gregory X's conclave rules. Dante places him among the avaricious in Purgatory.