Zagylis

The Diocese of Zagylis is the titular diocese of the Roman Catholic Church, established in 1933 by Pope Pius XI, named after the ancient city of Zagylis in present-day Libya. This city was in the Roman province of Libya Inferior. Since the foundation, the diocese had no titular bishop.

The diocese re-establishes an ancient bishopric that flourished in the Roman Empire. Three bishops from antiquity are known.
 * 1) Filocalo (fl.449)
 * 2) Massimo (fl.457)
 * 3) Giovanni (fl.480 circa)