Gelasius Cyzicenus was son of a presbyter of Cyzicum. He flourished about A.D. 476. He compiled A History of the Council of Nice, put together without judgment, in three books, the last of which is lost. It was published under the title of Gelasii Histar. Nicen, cura Rob. Balfour, Ga. et. Lat. (Paris, 1599, 8vo). It may be found also in Labbe, Concilia, volume 2, and in Migue, Pastrolomia Latina, volume 85. See Dupin, Eccl. Writers, volume 4; Fabricius, Bibl. Greca, volume 9; Cave, Hist. Lit. Ann. 476.