Diadochus bishop of Photia or Photiae (Epirus), lived about 460. Photius says (Cod. 201) that he had read a book of this bishop, containing ten definitions and a hundred chapters. Although this book has not come down unto our time, yet we have a translation from the Greek into Latin, made by the Jesuit Turrien under this title, S. Diadochi Episcopi Photiaes, Capita Centum de Pefectionae Spirituali, etc. (Florence, 1570; reprinted several times); but there is no evidence as to its authenticity. See Hoefer, Nouv. Biog. Generale, s.v.