the author is Saint Bonaventure, O.F.M., (Italian: San Bonaventura; 1221 – 15 July 1274), born Giovanni di Fidanza, was an Italian medieval scholastic theologian and philosopher. The seventh Minister General of the Order of Friars Minor, he was also a Cardinal Bishop of Albano. He was canonized on 14 April 1482 by Pope Sixtus IV and declared a Doctor of the Church in the year 1588 by Pope Sixtus V. He is known as the "Seraphic Doctor" (Latin: Doctor Seraphicus). Many writings believed in the Middle Ages to be his are now collected under the name Pseudo-Bonaventura.