The film is unusual in reinterpreting Arthur as a Roman officer rather than the typical medieval knight. Despite these departures from the source material, the Welsh Mabinogion, the producers of the film attempted to market it as a more historically accurate version of the Arthurian legends, supposedly inspired by new archaeological findings. The film also replaces the sword in the stone story with a more dark and tragic backstory of how Arthur claimed his sword Excalibur. The film was shot in Ireland, England, and Wales.