Constantine and the Cross (1962)

This movie was OK.  It's difficult to find a hard copy, but is readily available on YouTube.  It focuses mostly on the events leading up to Constantine having his famous vision and winning the battle that, in the film, is kind of anti-climactic.  A lot of the plot points, like Christians stubbornly refusing to renounce Jesus in the face of terrible death, are starting to feel pretty stale to me.  But, if you really love sword and sandal stuff, this one might be worth a look.