Phanom Rung, or full name, Prasat Hin Phanom Rung, is a Hindu Khmer Empire temple complex set on the rim of an extinct volcano at 402 metres elevation. It is located in Buriram Province in the Isan region of Thailand, and was built at a time when Khmer social-political influences were significant in Srisaket. It was built of sandstone and laterite between the 10th and 13th centuries. It was a Hindu shrine dedicated to Shiva, and symbolises Mount Kailash, his heavenly dwelling. Thailand's Department of Fine Arts spent 17 years restoring the complex to its original state from 1971 to 1988. On 21 May 1988, the park was officially opened by Princess Maha Chakri Sirindhorn. In 2005, the temple was submitted to UNESCO for consideration as a future World Heritage Site.