Stock photography, photos: Cannon at Castle Stock photos of Cannon on Castle Ramparts in Lisbon Portugal Photograph: © John Rattle Click for a larger image and more information Keywords associated with this stock photo: Artillery, Protection, siege, Castle, Battlements, guard, guarding, ancient, historic, Lisbon, Lisboa, george, castelo, Portugal, Cannon, sao, moorish, Gun, Jorge, moors, army, rampart, Soundsnaps, plinth