Monument of Thao Suranari or Khun Ying Mo is situated in front of the old gate of "Pratu Chumpon" on the west side of the city. This monument was erected in 1934 to commemorate the heroic deed of Khun Ying Mo, wife of the Deputy Governor of Khorat during the reign of King Rama III, who managed to save the city from the invasion of the Laotian army led by Prince Anuwong of Vientiane. Every year from March 23 to April 3, there is a cerebration to honour this statue which draws thousands of people from town and neighbouring provinces.
In 1825 Chao Anuwongse of Loas aimed to free Vientiane from subordination to Bangkok. Upon hearing the wrong news, that there would be a war between Thailand and England. Chao Anuwongse took a chance to rebel against King Rama III; he moved his troops to take over Nakhon Ratchasima. The Deputy Governor of Nakhon Ratchasima and his brave wife named Mo, persuaded people to get together and fight with the Loas troops. They could kill thousands of Vientiane soldiers and helped Thai troops to drive Loas back to Vientiane. King Rama III rewarded Lady Mo by giving the noble title as Tao Suranari