The Diocese of Zagylis is the titular diocese of the Roman Catholic Church,Annuario Pontificio 2013 (Libreria Editrice Vaticana 2013 ), "Sedi titolari", pp. 819-1013 established in 1933 by Pope Pius XI, named after the ancient city of Zagylis in present-day Libya.GCatholic
This city was in the Roman province of Libya Inferior.Zagylis at Catholic-hierarchy.org Since the foundation, the diocese had no titular bishop.Zagylis at www.gcatholic.org
The diocese re-establishes an ancient bishopric that flourished in the Roman Empire.Pius Bonifacius Gams, Series episcoporum Ecclesiae Catholicae, (Leipzig, 1931), p. 462. Three bishops from antiquity are known.Michel Le Quien, Oriens christianus in quatuor Patriarchatus digestus, (Paris, 1740), vol.II, coll. 635-636 Filocalo (fl.449) Massimo (fl.457) Giovanni (fl.480 circa)
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