Here, the "Heritage of Phra Ruang" as Sukhothai, Si Satchanalai, and Kamphaeng Phet inherited from knowledge and art from ancestors for over 700 years.

"Heritage of Phra Ruang", a brand of tourism that reflects the essence of the three historical cities of the Sukhothai Kingdom. Designated Areas for Sustainable Tourism Administration (Public Organization) or DASTA has held a community meeting in the area to develop this symbol system since 2015.

• The pagoda with a shape of a budding lotus, the unique architecture of Phra Ruang's Land. • The squares are tied together in three rings. The art and science of the three cities. • The middle square from the World Heritage Badge • Brown - Archeological sites and antiques/ Green - Agricultural cities / Blue - Freedom

“Phra Ruang” is the name of the king of the Sukhothai period who was a builder of the city with Buddhist principles, with agriculture, irrigation, transportation, trading, handicrafts, and Thai fonts (Lai Sue Thai). It became a peaceful environment, with the happiness of the people thanks to the virtues of the king. There were the local tales of Phra Ruang saying that he had supernatural words passing many valuable things through several generations. The places or activities with this symbol can be assumed as the heritage inherited from the Phra Ruang dynasty as the "Art on the Origin of Siam" and is also the heritage which the locals are proud of.