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Situated behind Thao Suranari Monument is the old city gate that can be dated back to the 17th century. During the reign of King Narai the construction of a stronger city wall was commanded. A wooden watchtower with a tiled roof and decorated in the Thai-style was constructed on top of the Gate, which was constructed of stone and brick and covered with plaster. This Gate is the only gate of the four original gates that is open to the public, as the other three are being renovated.