Wat Phra That Chang Kham Worawihan was originally called "Wat Luang" or "Wat Luang Klang Wiang." It is located opposite the Nan National Museum (Ho Kham) in Tambon Nai Wiang, Amphoe Mueang Nan, Nan Province. The ruler of Nan, Phraya Phu Kheng, commissioned its construction in 1949. The temple is over 600 years old. The main Buddha statue is a large stucco Buddha in the Chiang Saen style, crafted by Nan artisans and reflecting the region's typical characteristics. Phra Chao Luang is a Buddha statue in the Mara Vijaya posture, seated cross-legged. It is made of stucco and decorated with gold leaf. It measures 4.5 meters in width and 6 meters in height. The statue is in the Lanna style. It is located in the royal chapel of Wat Phra That Chang Kham and is considered the Buddha statue of Nan Province.

It is revered as sacred by the inhabitants of Nan. Besides its beauty, it features a sangkhati (a type of flower stem) adorned with intricate glass elements. The altar's base is designed in the form of a three-headed roof overhang. Inside the chapel is a standing bronze Buddha statue in the posture of forgiveness. Dating from the second half of the 19th Buddhist century, it belongs to the late Sukhothai period. It is similar to the Buddha statue in the same posture at Wat Ratchathani in Sukhothai Province.

Wat Phra That Chang Kham, a tourist attraction in Nan Province, Suriyapong Road, Nai Wiang Subdistrict, Mueang Nan District, Nan 55000