The climactic escape sequence in the catacombs was shot in an actual ancient ruin.
The liquor in the party scenes was real.
The weapons used in the fight scenes were real. Fortunately, nobody got hurt during the filming of the fight scenes.
Leading lady Margaret Markov and producer Mark Damon, despite being attracted to each other, could not date during production as director Steve Carver had a strict rule regarding fraternization among cast & crew members.