Florestan was Prince of Monaco and Duke of Valentinois from 2 October 1841 until his death in 1856. He was the second son of Prince Honoré IV and Louise d'Aumont Mazarin and succeeded to the throne on

Duke of Valentinois is a title of nobility, originally in the French peerage. It is currently one of the many hereditary titles claimed by the Prince of Monaco despite its extinction in French law in