Complex sentence: Between the years 1323 and 1326 there was an outer ward and curtain wall built along with three towers, there were also two ditches, one situated outside of the curtain wall one in the outer ward.
Split into simpler sentences: Between the years 1323 and 1326 there was an outer ward and curtain wall built, along with three towers. There were also two ditches, one situated outside of the curtain wall and one in the outer ward.