The former French Catholic diocese of Alais (now written Alès) was created in 1694, as part of the diocese of Nîmes. It was suppressed after the French Revolution, with its territory being divided between the diocese of Avignon and the diocese of Mende. Its seat was Alès Cathedral.
Ancient Diocese of Alais Wikipedia
About 570, Sigebert, King of Austrasia, created a see at Arisitum (Alais) taking fifteen parishes from the Diocese of Nîmes. In the eighth century, when Septimania was annexed to the Frankish Empire, the Diocese of Alais was suppressed and its territory returned to the Diocese of Nîmes.
After the Edict of Nantes, Alais was one of the places de sûreté given to the Huguenots. Louis XIII took back the town in 1629, and the Convention of Alais, signed 29 June of that year, suppressed the political privileges of the Protestants.
At the request of Louis XIV, a see was again created at Alais by Pope Innocent XII, in 1694. The future Cardinal de Bausset, Bossuet's biographer, was Bishop of Alais from 1784 to 1790.1694-1712 : François Chevalier de Saulx
1713-1719 : Louis François-Gabriel de Henin-Liétard
1721-1744 : Charles de Bannes d'Avejan
1744-1755 : Louis-François de Vivet de Montclus
1756-1776 : Jean-Louis du Buisson de Beauteville
1776-1784 : Pierre-Marie-Madeleine Cortois de Balore
1784-1791 : Louis-François de Bausset