The Constitution also stated that bishops should in future be elected, not appointed by the Vatican.
On 30 September 1790 the Bishop of Cornouaille (also known as the Bishop of Quimper) died.
His successor would be the first bishop to be chosen by the new constitutional rules.
On 1 November, the electoral body for Finistère was convened at Quimper Cathedral despite opposition from the cathedral chapter.
Expilly was proclaimed the first constitutional bishop of France.
Church traditionalists would not support an elected bishop and so there was no-one to consecrate him.
The Archbishop of Rennes refused, and in the end, Expilly had to go to Paris to be made a bishop by Talleyrand, the revolutionary Bishop of Autun.
The consecration eventually took place on 24 February 1791.
In April 1791, Pope Pius VI issued an encyclical condemning Expilly and Talleyrand.Expilly was connected with the Girondist Commission des douze (Committee of Twelve), a group which stirred up opposition by a vigorous campaign of arresting "conspirators".
He was imprisoned in June 1793, but released in August after modifying his position.
However, he did not survive much longer.
On 22 May 1794 he was guillotined in Brest, the last person executed that day as he had been giving absolution to his fellows waiting at the scaffold.
There would be no Bishop of Quimper/Cornouaille for the next four years.