NICEPHORUS Callistus, an ecclesiastical historian, was born towards the close of the thirteenth century, and died about 1350. In his thirty-sixth year he was engaged at Constantinople in the composition of an Historia Ecclesiastica, founded on the narratives of Eusebius, Socrates, Sozomen, Theodoret, Evagrius, and others. It is filled with absurd fables; and of the twenty-three books only eighteen are extant. They were published in Greek and Latin, in 3 vols. fol., Paris, 1630.