The Pho Khun Ngam Mueang Memorial, located in the public park on the bank of Kwan Phayao, commemorates a former king of Phayao, or Phu Kam Yao, who was in power some 700 years ago. During his reign, the state prospered and expanded its territory. As a close ally of King Mengrai, the ruler of Chiang Rai, and King Ramkhamhaeng of Sukhothai, they formed an alliance of harmony, loyalty and non-aggression.