Birth. Ca. 1216, Lyon, France. His last name is also listed as Aygler; as Ayglerius; as Aygler; as Ayglier; and as Aiglier.

Education. Entered the Order of Saint Benedict (Benedictines) in the monastery of Savigny, archdiocese of Lyon.

Priesthood. Ordained (no further information found). Named papal chaplain by Pope Innocent IV. Auditor of the Sacred Roman Rota ca. 1244. Abbot of the monastery of S. Onorato in the island of Lerino in 1256. Carlo d'Anjou had him go to Naples and Sicily when he became the monarch of that kingdom; he became privy counselor of the king. Pope Urban IV named him 59th abbot of Monte Cassino, ca. 1263; he occupied the post until his death; he recalled the monks from exile, made the monastic discipline flourish and recuperated the good that had been spoiled; he founded a hospital in S. Germano; celebrated a synod; and granted a church in that place to the Dominicans at the request of Tommaso d'Aquino, future saint.

Cardinalate. Created cardinal in the consistory of 1265 or 1268; his title or deaconry is not known (1). Legate in France against the Albigense. Legate in Constantinople against the schismatics and to promote the war against the Saracens. Returned to Monte Cassino and convinced King Carlo d'Anjou to withdraw his troops that had occupied the adjacent castle. He did not participate in any of the conclaves that took place after his supposed promotion to the cardinalate.

Death. April 4, 1282, Monte Cassino. Buried in the abbey of Monte Cassino, without any marks or epitaph.

Bibliography. Cardella, Lorenzo. Memorie storiche de' cardinali della Santa Romana Chiesa. Rome : Stamperia Pagliarini, 1792, I, pt. 2, 310-312; Chacón, Alfonso. Vitæ, et res gestæ Pontificvm Romanorum et S. R. E. Cardinalivm ab initio nascentis Ecclesiæ vsque ad Vrbanvm VIII. Pont. Max. 2 volumes. Romae : Typis Vaticanis, 1677, II, col. 175-176; Cristofori, Francesco. Cronotasi dei cardinali di Santa Romana Chiesa. Rome : Tipografia de Propaganda Fide, 1888, 267; Du Chesne, François. Histoire de tous les cardinaux françois : de naissance, ou qui ont esté promeus au cardinalat par l'expresse recommandation de nos roys, pour les grands services qu'ils ont rendus a leur estat, et a leur couronne. Comprenant commairement leurs legations, ambassades & voyages par eux faits en divers pays & royaumes, vers les papes, empereurs, roys, potentats, republiques, communautex & universitez, pour affaires importantes à l'église universelle, & à l'auguste majesté de nos souuerains. Enrichie de leurs armes et de leurs portraits. Divisée en deux tomes, et justifiée par titres et chartres du thresor de sa majesté, arrests des parlemens de France, registres des Chambres des comptes; donations, fondations, epitaphes, testamens, manuscripts, ancients monumens, chroniques & chartulaires d'abbayes, & autres histoires publiques & particlieres. 2 vols. A Paris : Aux despens de l'autheur, & se vendent chez luy ..., 1660, II, 269-270; "Essai de liste générale des cardinaux. Les cardinaux du XIIIè siècle". Annuaire Pontifical Catholique 1929. Paris : Maison de la Bonne Presse, 1929, p. 125-126; Eubel, Conradus and Gulik, Guglielmus van. Hierarchia Catholica Medii Aevi. Volumen I (1198-1431). Münich : Sumptibus et Typis Librariae Regensbergianae, 1913; reprint, Padua : Il Messagero di S. Antonio, 1960, p. 8.