Pha That Luang
Buddhist missionaries from the Mauryan Empire are believed to have been sent by the Emperor Ashoka, including Bury Chan or Praya Chanthabury Pasithisak and five Arahata monks who brought a holy relic (believed to be the breastbone) of Lord Buddha to the stupa in the 3rd century BC. It was rebuilt in the 13th century as a Khmer temple which fell into ruin.