City Pillar of Chiang Mai is located within the grounds of Wat Chedi Luang, in the heart of the Old City. The city pillar, or lak muang, is called Sao Inthakin (Indra's pillar). It is made of brick, and is 50 centimeters tall, and housed within an octagonal brick structure.
City Pillar Shrine of Chiang Mai (24 October 2006)
The City Pillar of Chiang Mai was originally located at Wat Sadeu Muang. It was moved here by Chao Kawila in the year 1800, when Chiang Mai was being rebuilt and repopulated. At the same time, three dipterocarp trees, called Yang Tree, were planted at the grounds. The largest of them all tower above the City Pillar Shrine. Local belief is that the tree helps to protect the city for as long as it stands.
Sao Inthakin, or Indra's Pillar, the name of the City Pillar of Chiang Mai (24 October 2006)