Postal services in Monaco are provided by France, as assured by the Treaty of Péronne in 1641.Duursma, p. 262. As the Spanish protectorate became too dominant, the Prince of Monaco concluded the Treaty of Péronne on 14 September 1641 with King Louis XIII of France... This relationship has been interrupted twice, with the first interruption occurring during the French Revolution. By Decree of the National Convention on 27 October 1793, the Principality of Monaco was integrated into the territory of France until the passing of the Treaty of Paris on 30 May 1814. The second interruption occurred just shortly after as a result of the Second Treaty of Paris (20 November 1815), which made Monaco a protectorate of the Kingdom of Sardinia. This led to the Monégasque postal system becoming Sardinian from the signing of the Treaty of Stupinigi (taking effect on 1 January 1818) until the signing of the Treaty of Turin on 24 March 1860, again making Monaco a principality of France, and restoring the postal relationship. (in French)
