Phet Fort, Military fort in Ho Rattanachai, Thailand.
Phet Fort is a fortification at the confluence of the Pa Sak and Lopburi Rivers, built with high brick walls and an original circular layout. The structure features cannon platforms on the lower level and raised observation points for monitoring the water.
The fort was built between 1548 and 1569 under King Maha Chakkraphat to protect trading ships and the river entrance. A French engineer later reshaped it into a rectangular form to adapt it to changing requirements.
The fort shows how people built defenses at this location in the 16th century to protect river commerce and visiting ships. Its circular form with thick walls reflects the exchange between local and foreign construction methods.
The site is best explored on foot and allows access to the various levels and cannon positions. The location by the river means the ground can be damper and more slippery after rain.
The fort withstood a major Burmese siege in 1767 despite fighting against overwhelming odds. This defense remains an important moment in local memory of resistance and military resilience.
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