During the scene early in the movie in the Taberna, Stuart Whitman is throwing knives at Bradford Dillman's hands, placed on a pillar. In the long shot, the knife lands between Dillman's index and middle finger. In the close-up, the knife is between the thumb and index finger.
Several times in the movie, you can see the Basilica of Saint Francis in the background. It wasn't built before 1230, four year after Saint Francis' death.