via Bangkok Post, 18 September 2018: Thailand intends to nominate Si Thep as a Unesco World Heritage Site.
Thailand is preparing to propose Sri Thep Historical Park in Phetchabun as a World Heritage Site, following on the footsteps of the 700-year-old city of Sukhothai and Ban Chiang archaeological site in Udon Thani.
Sri Thep Historical Park has been listed as a national archeological site since 1935.
The ancient city was once an important cultural centre in the region, spanning across parts of the lower north provinces of Thailand, including Phetchabun, Phitsanulok, Tak, Sukhothai and Uttaradit.
Source: Sri Thep proposed as World Heritage Site | Bangkok Post: news
via Bangkok Post, 05 Feb 2018:
Wearing a long-sleeve shirt and wide-brim hat, both hands clutching various digging tools, several men stooped down on the dry red dirt. With their feet planted firmly and under the supervision of archaeologists, they began digging in order to uncover the history of their homeland.
Source: Preserving history
A statue of Vishnu discovered in the Sithep Historical Park in Thailand hints at the larger exchange networks that would have existed during the Dvaravati and Khmer periods.
Statue of Vishnu discovered at Sithep Historical Park, Bangkok Post 20130330
Glimpses into pre-Siam life
Bangkok Post, 30 March 2013