Cardinal, surnamed the Seraphic Doctor, his real name John Fidenza, born in Tuscany; entered the Franciscan Order; was chosen general of the Order and papal legate at the Council of Lyons in 1274, during the session of which he died; was a mystic in theology; ascribed knowledge of the truth to union with God, such as existed between man and his Maker prior to the Fall, a state which could be recovered only by a life of purity and prayer; his writings were admired by Luther (1221-1274).