During the French occupation of Monaco, Honoré IV was imprisoned for several years.

After the fall of Napoleon I in 1814, he regained control of the principality – thanks to a clause added by Charles Maurice de Talleyrand-Périgord at the Congress of Vienna stating, "the Prince of Monaco should return to his estates" – and passed on his titles to his eldest son, Prince Honoré V. Illnesses resulting from his imprisonment incapacitated Honoré IV in his later years, and following the re-establishment of the Principality in 1814, a regency was established to rule in Honoré's name.

This regency was directed, first, by his brother Joseph Grimaldi, then from 1815 by his son, the Hereditary Prince Honoré, who succeeded him in 1819 as Sovereign Prince Honoré V.[1] Honoré IV married Louise Félicité Victoire d'Aumont, Duchess of Aumont, Duchess Mazarin and of La Meilleraye on 15 July 1777 in Paris.

They divorced in 1798 and had two sons: This Monegasque biographical article is a stub.

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