The former French diocese of Sisteron existed until the French Revolution. Its see was at Sisteron in southern France and at Forcalquier, in the modern department of Alpes-de-Haute-Provence. Sisteron was the only diocese in France which had two cathedrals. Each cathedral had a Chapter, and the two Chapters voted together when an election was held to elect a new bishop of Sisteron. The diocese of Sisteron was part of the ecclesiastical province of Narbonensis Secunda, whose Metropolitan was the Archbishop of Aix-en-Provence.

The Archdiocese of Aix-en-Provence and Arles is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in France. The archepiscopal see is located in the city of Aix-en-Provence. The diocese comprises the department of Bouches-du-Rhône, in the Region of Provence-Alpes-Côte d'Azur. It is currently a suffragan of the Archdiocese of Marseilles and consequently the archbishop no longer wears the pallium.