A new walled-city with a surrounding moat, designated as Nakhon Ratchasima, was built in the 17th century by order of the King Narai, as the easternmost "command post", guarding the kingdom's border. It continued this duty during the Bangkok Period, although it was briefly seized during Chao Anuwong of Vientiane's 1826 revolt against King Rama III of Siam.