imprisoned in France and his property and estates, including the palace, were forfeited to France. The palace was looted by the prince's subjects, and what remained of the furnishings and art collection was auctioned by the French government. Further changes were heaped on both the country and palace. Monaco was renamed Fort d'Hercule and became a canton of France while the palace became a military hospital and poorhouse. In Paris, the prince's daughter-in-law Francoise-Thérèse de Choiseul-Stainville (1766–1794) was executed, one of the last to be guillotined during the Reign of Terror. Honoré III died in 1795 in Paris, where he had spent most of his life, without regaining his throne. 19th century Regaining the palace Honoré III was succeeded by his son Honoré IV (1758–1819) whose marriage to Louise d'Aumont Mazarin had done so much to restore the Grimaldi fortunes. Much of this fortune had been depleted by the hardships of the revolution. On 17 June 1814 under the Treaty of Paris, the Principality of Monaco was restored to Honoré IV. The fabric of the palace had been completely neglected during the years in which the Grimaldi had been exiled from Monaco. Such was the state of disrepair that part of the east wing had to be demolished along with Honoré II's bathing pavilion, which stood on the site occupied today by the palace's former Napoleon Museum, which closed in 2014, and the building housing the palace archives. Restoration Honoré IV died shortly after his throne was restored to him, and structural restoration of the palace began under Honoré V and was continued after his death in 1841 by his brother Prince Florestan. However, by the time of Florestan's accession, Monaco was once again experiencing political tensions caused by financial problems. These resulted from its position as a protectorate of Sardinia, the country to which it had been ceded by France following the end of the Napoleonic wars. Florestan, an eccentric (he had been a professional actor), left the running of Monaco to his wife, Maria Caroline Gibert de Lametz. Despite her attempts to rule, her husband's people were once again in revolt. In an attempt to ease the volatile situation Florestan ceded power to his son Charles, but this came too late to appease the Monégasques. Menton and Roquebrune broke away from Monaco, leaving the Grimaldi's already small country hugely diminished—little more than Monte Carlo. Florestan died in 1856