Fortress

These laterite fortresses are in the location of interior city wall area housed in the corner of the city in all 4 directions such as southwest corner fortress, northwest corner fortress, northeast corner fortress and southeast corner fortress (the southeast corner fortress is now disappeared) All fortresses have the landscapes in a rhombus shape equipped with acute arrow-like angles that are sticking out to the moat. The bases were built as a high version of core bases and slightly sloped up while the battlements were set up on the top part of the walls. Also, the stairs to the fortresses were built interior.