Complex sentence: The known area of the palace measures 200m from north to south and 120 meters from east to west, this is most likely only a portion of the original design, including the possibility of an upper level while no concrete evidence of this remains.
Split into simpler sentences: The known area of the palace measures 200m from north to south and 120 meters from east to west. This is most likely only a portion of the original design, including the possibility of an upper level while no concrete evidence of this remains.