A catalogue of Western manuscripts at the Bodleian Libraries and selected Oxford colleges

Callistus II, Saint, Patriarch of Constantinople, active 14th century & Ignatius Xanthopulus, ca. 1397/1400: Methodus et Regula, seu Centuria (opuscula Ascetica, Auctoribus Callisto Atque Ignatio Xanthopulis) [Greek]

Bibliography:
  • PG 147.636-812

The above references reflect only the current coverage of the online catalogue and may not be comprehensive.