Sasima is mentioned in only three non-religious documents: "Itiner. Anton.", 144; "Itiner. Hiersol.", 577; Hierocles, 700, 6. The very small town is known for being the first see of St. Gregory of Nazianzus who was appointed to it by his friend St. Basil as an aspect of Basil's conflict with Anthimus. Gregory was there only briefly, if at all. Anthimus, bishop of Tyana, had claimed status as an archbishop and jurisdiction over Sasima after the Emperor Valens divided Cappadocia into two parts. Anthimus appointed a competing claimant bishop for Sasima to whom Gregory effectively ceded the town. All the Greek Notitiæ episcopatuum consider Sasima subject to Cappadocia Secunda, while the catalogue of the Roman Curia places it under Cappadocia Prima, i.e., as a suffragan of the archbishopric of Cæsarea.
Towards 1143 Clement was condemned as a Bogomile. The "Notitiæ" mention the see until the following century.