GELASIO di CESAREA. — Son of a sister of Cirillo di Gerusalemme, born ca. 335–336, died ca. 404–405. From ca. 365–366 he was bishop of Cesarea. Under the emperor Valens he had to yield his see to the Arian Euzoius.
In 379 he returned to Cesarea. S. Girolamo mentioned him in De viris illustribus. Fragments of his writings have been preserved in Teodoreto, Leenzio di Bisanzio, Severo d’Antioche, and the Doctrina Patrum. He was the author of an Institutio practica, probably a collection of catechetical discourses in the style of the work of his 20 Cirillo di Gerusalemme. An Expositio symboli formed part of this collection of at least 20 treatises. That he was the true author of the continuation of the Historia ecclesiastica of Eusebio, attributed to Rufino, cannot be proved. It appears that G. expanded the work of Eusebio and translated Rufino’s continuation into Greek. Pozio also knew of a writing by him against the Arians (“anemei”).