Colossus of the Arena
Maciste il gladiatore più forte del mondo (original)
A powerful man posing as a gladiator in Rome's fourth century discovers a plan to put the beautiful Queen in prison, which he thwarts by exposing a sinister duke as a traitor.
Starring Mark Forest, Scilla Gabel, Jon Chevron, José Greci, Erno Crisa, Germano Longo, Dan Vadis, Vittorio Sanipoli, Maurizio Conti, Carlo Pisacane
Watch "Colossus of the Arena" on Amazon released in 1962. It's a drama and action & adventure movie, and has a rating of 5.7 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently only available for purchase or rent.