The Musée de la Franc-Maçonnerie (French Museum of Freemasonry) is a museum of Freemasonry located in the 9th arrondissement at 16, rue Cadet, Paris, France. It is open daily except Sundays and Mondays; an admission fee is charged. The closest métro station is Cadet.The museum was established in 1889 by the Grand Orient de France as a cabinet of curiosities in the Hotel Cadet. It was despoiled in the German occupation of France during World War II but reopened in 1973, and in 2000 became an official museum of France. In that same year, many of its historical documents were returned from Moscow, where they had been held by the KGB after Germany's defeat in World War II.