Cybistra, a titular see of Cappadocia in Asia Minor. Ptolemy (5, 7, 7) places this city in Lycaonia; Strabo (12, 535) in Cilicia; Cicero (Epist. ad fain., 15, 2, 4) in Cappadocia extremes, near the boundary of Cilicia and not far from Taurus. It is mentioned as a suffragan of Tyana, metropolis of Cappadocia Secunda, in the “Synecdemus” of Hierocles (700), and in some early “Notitii episcopatuum”. It was captured by Harun in 805, and by Almamun in 832. Afterwards, probably in the eleventh century, it was made an independent archbishopric (Parthey’s Notitiae, 10 and 11); it still remained a Byzantine possession after a great part of Cappadocia had passed into Turkish hands. From the eighth to the eleventh centuries we hear often of a fortress Heracleia, now known to have been near Cybistra and united with it in one bishopric (Notitia, 10). The name of this fortress has been preserved in the modern form, Eregli, a poor village and the center of a caza in the vilayet of Konia. Five bishops are quoted by Lequien (I, 403); the first was present at Nicina in 325, the last at Constantinople at the end of the twelfth century.