Reforms, sponsored by the duke, abolishing manorialism and feudalism and establishing a constitutional basis for the monarchy did not prevent what many sources describe as the proclamation of a republic in April 1794.

1728, r. 1771, d. 1792), duke of Bouillon and prince of Turenne, favourable to the French Revolution, committed his duchy to the path of reform by an edict of 24 February 1790 and supported his assemblée générale (parliament) when it voted to abolish manorial and feudal rights on 26 May 1790.

[1] A decree of 22 March 1800 (1 Germinal VIII), after Napoléon's accession to the French throne, ended the sequester of the ducal estates and allowed him to regain possession.

[1] After the end of the French occupation in April 1814, the territory of the former duchy was occupied by the Allied Powers, the duchy was restored briefly, headed by a British admiral from Jersey, Philippe d'Auvergne, cousin of the ducal family, adopted by duke Godefroy, who had agreed with the assemblée générale as heir should Jacques Léopold die without issue.

The question of compensation for rights-holders and other ducal pretenders was not settled, however, and became a subject of legal dispute for over a decade; the princes of Guéméné now hold claim to the throne of the extinct duchy.