Casanova & Co.
While hiding from the royal authorities, Giacomo Casanova, the famous romancer, encounters his look-alike: Giacomino, a fugitive petty con man. Meanwhile, the Arabian Caliph and his wife are arriving in Venice for a state visit, and she insists on a night with the legendary lover. Through a series of erotic encounters and mistaken-identity comedies, Giacomo and Giacomino make their way back to Venice for their appointment with the Caliph's wife.
Starring Tony Curtis, Marisa Berenson, Marisa Mell, Jean Lefebvre, Andréa Ferréol, Sylva Koscina, Victor Spinetti, Umberto Orsini, Jenny Arasse, Jacques Herlin
Watch "Casanova & Co." on Tubi TV released in 1977. It's a comedy and drama movie, and has a rating of 4.6 out of 10 from Imdb which is fairly low for this kind of movie, and is currently available to watch for free.