Phayao is a province in the upper northern region of Thailand. lts current location is next to Kwan Phaya o, or Phayao Lake. Historically, this location was home to the seulement of Muang Phukamyaww or Muang phayaww. which was established in the 16th century BE lts ruler was Phor Khun Ngam Muang or King Ngom Muang. Later, the governing system was changed and Phayao become part of the Lanna Kingdom. During the time of the Rattanakosin Kingdom, Muang Phayao became one of the districts in Chiong Rai province. It was referred to as Phayoo district. However, on the 20 August 1977. Phayoo district was promoted to Phayao province, becoming the 72 province of Thailand