Preah Vihear Temple is a Hindu temple built during the reign of Khmer Empire

Preah Vihear Temple is a Hindu temple built during the reign of Khmer Empire, that is situated atop a 525-metre (1,722 ft) cliff in the Dângrêk Mountains, in the Preah Vihear province, Cambodia. In 1962, following a lengthy dispute between Thailand and Cambodia over ownership, the International Court of Justice (ICJ) in The Hague awarded the temple to Cambodia.

Affording a view for many kilometers across a plain, Prasat Preah Vihear has the most spectacular setting of all the temples built during the six-centuries-long Khmer Empire. As a key edifice of the empire's spiritual life, it was supported and modified by successive kings and so bears elements of several architectural styles. Preah Vihear is unusual among Khmer temples in being constructed along a long north-south axis, rather than having the conventional rectangular plan with orientation toward the east. The temple gives its name to Cambodia's Preah Vihear province, in which it is now located, as well as the Khao Phra Wihan National Park which borders it in Thailand's Sisaket province and through which the temple is most easily accessible. On July 7, 2008, Preah Vihear was listed as a UNESCO World Heritage Site.

Prasat Preah Vihear is the compound of words Prasat, Preah and Vihear. Prasat mean "castle", sometimes "temple"; in Sanskrit. Preah mean "sacred". "Vihear" mean "shrine" (the central structure of the temple). The word Vihear could be related to the Sanskrit word Vihara which means "abode. 

The temple sits atop Pey Tadi, a steep cliff in the Dângrêk Mountains which located in Cambodia. During different periods it has been located in Cambodia and Thailand in turn. Following Cambodian independence and during the Thai occupation of the temple site, it was listed as being in Bhumsrol village of Bueng Malu sub-district (now merged with Sao Thong Chai sub-district), in Kantharalak district of the Sisaket province of eastern Thailand. It is 110 km from the Mueang Si Sa Ket district, the center of Si Sa Ket province.

After the ICJ ruled in 1962 that it belonged to Cambodia, the temple was listed as being in Svay Chrum Village, Kan Tout Commune, in Choam Khsant District of Preah Vihear province of northern Cambodia. The temple is 140 km from Angkor Wat and 320 km from Phnom Penh.

Construction of the first temple on the site began in the early 9th century; both then and in the following centuries it was dedicated to the Hindu god Shiva in his manifestations as the mountain gods Sikharesvara and Bhadresvara. The earliest surviving parts of the temple, however, date from the Koh Ker period in the early 10th century, when the empire's capital was at the city of that name. Today, elements of the Banteay Srei style of the late 10th century can be seen, but most of the temple was constructed during the reigns of the Khmer kings Suryavarman I (1002–1050) and Suryavarman II (1113–1150). An inscription found at the temple provides a detailed account of Suryavarman II studying sacred rituals, celebrating religious festivals and making gifts, including white parasols, golden bowls and elephants, to his spiritual advisor, the aged Brahmin Divakarapandita. The Brahmin himself took an interest in the temple, according to the inscription, donating to it a golden statue of a dancing Shiva known as "Nataraja".[citation needed] In the wake of the decline of Hinduism in the region the site was converted to use by Buddhists.

Entrance to the temple structure: The temple complex runs 800 m (2,600 ft) along a north-south axis facing the plains to the north, from which it is now cut off by the international border. It consists essentially of a causeway and steps rising up the hill towards the sanctuary, which sits on the clifftop at the southern end of the complex (120 m/390 ft above the northern end of the complex, 525 m/1,722 ft above the Cambodian plain and 625 m/2,051 ft above sea level). Although this structure is very different from the temple mountains found at Angkor, it serves the same purpose as a stylised representation of Mount Meru, the home of the gods.

The approach to the sanctuary is punctuated by five gopuras (these are conventionally numbered from the sanctuary outwards, so gopura five is the first to be reached by visitors). Each of the gopuras before the courtyards is reached by a set of steps, and so marks a change in height which increases their impact. The gopuras also block a visitor's view of the next part of the temple until they pass through the gateway, making it impossible to see the complex as a whole from any one point.

The fifth gopura, in the Koh Ker style, retains traces of the red paint with which it was once decorated, although the tiled roof has now disappeared. The fourth gopura is later, from the Khleang/Baphuon periods, and has on its southern outer pediment, "one of the masterpieces of Preah Vihear" (Freeman, p. 162) : a depiction of the Churning of the Sea of Milk. The third is the largest, and is also flanked by two halls. The sanctuary is reached via two successive courtyards, in the outer of which are two libraries.