สวนสันติชัยปราการ Published caption : Located along the bank of Chao Phraya River on Phra Athit Road, Phra Sumen Fort was built in a hexagonal shape. It is one of the two forts that have survived time and modernisation. The fort was renovated by the Fine Arts Department in 1981. A public park was built in the same area in 1999 to celebrate the 72nd birthday of His Majesty King Bhumibol Adulyadej the Great (King Rama IX). Called Suan Santichaiprakan, the park also houses the Santichaiprakarn Throne Hall, the only riverside throne.