Complex sentence: The Crusaders may have intended to build stone walls and towers on the outwork, though it is unknown how it was defended at the time of the 1271 siege although it has been suggested that it was surrounded by a timber palisade.
Split into simpler sentences: The Crusaders may have intended to build stone walls and towers on the outwork. It is unknown how it was defended at the time of the 1271 siege, though it has been suggested it was surrounded by a timber palisade.