 Two weeks before location shooting was scheduled to begin, the  Scottish Department of the Environment withdrew permission for the  Pythons to shoot within their castles, saying that the films script  would be "incompatible with the history and fabric" of the castles.  The interiors of Camelot and Swamp Castle, and exteriors of Castle  Anthrax, French Castle and the opening castle were all shot at Doune  Castle (with various rooms redecorated and reused many times).  Recently