That Night in Varennes (1982)
That Night in Varennes (; ) is a 1982 Italian and French drama film directed by Ettore Scola. It is based on a novel by Catherine Rihoit. It tells the story of a fictional meeting between Restif de la Bretonne, Giacomo Casanova, Thomas Paine and Sophie de la Borde (a lady in waiting to the Queen). They are all traveling together in a coach that is a few hours behind the one that is carrying King Louis XVI and Marie Antoinette in their flight to Varennes during the French Revolution.
More at Wikipedia.