As of 2000 it is no longer a metropolitan see, and is now a suffragan of the Archdiocese of Palermo.

[1][2] In 1174 the abbey of Monreale was declared a prælatura nullius; two years later its abbot was vested with the title and jurisdiction of a bishop.

On 2 February 1183, thanks to the Bull Licet Dominus of Pope Lucius III, Monreale became the metropolitan see for the diocese of Catania and the diocese of Siracusa.

The former having become the metropolitan of Caltagirone, Monreale received the new diocese of Caltanisetta (1860), which see and Girgenti became its only suffragans.

[4] Erected: 1176 Latin Name: Montis Regalis Elevated: 5 February 1183 Latin Name: Montis Regalis This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.