[1] The names, dates, and order of the bishops between c. 1230 and 1340 is the subject of confusion, in the sources and in the modern authorities.
Barthélémy Hauréau, in 1860, cited an unpublished document dated 1310, written by Bishop Guillelmus,[2] in which the bishop refers to his predecessors by name and order: Soffredus, Petrus, Falco, and Guillelmus.
[4] In 1790 the ancien régime and the system of dioceses were abolished by the French revolution.
New dioceses were ordered by the National Assembly in the Civil Constitution of the Clergy of 12 July 1790,[58] the diocese of Isère, in the Constitutional Church.
Constitutional bishops were elected by special electors approved by the regime.