Summary: The Eternal City is threatened by a modernistic doomsday weapon. Harrison decides to investigate, cutting a swath through various well-armed antagonists. It turns out that the horrible weapon turns out to be little more than an outsized catapult. (All Movie Guide)

AKA: Giganti di Roma, I

Genre: Adventure

Country: France, Italy

Directed By: Antonio Margheriti

Written By: Ernesto Gastaldi, Arlette Combret

Starring: Ettore Manni, Richard Harrison, Wandisa Guida, Philippe Hersent, Rulph Hudson, Nicole Tessier

More information at the Internet Movie Database