The Bayon is a well-known and richly decorated Khmer temple at Angkor in Cambodia. Built in the late 12th century or early 13th century as the official state temple of the Mahayana Buddhist King Jayavarman VII, the Bayon stands at the centre of Jayavarman's capital, Angkor Thom. Following Jayavarman's death, it was modified and augmented by later Hindu and Theravada Buddhist kings in accordance with their own religious preferences.
The Bayon's most distinctive feature is the multitude of serene and massive stone faces on the many towers which jut out from the upper terrace and cluster around its central peak. The temple is known also for two impressive sets of bas-reliefs, which present an unusual combination of mythological, historical, and mundane scenes. The current main conservatory body, the Japanese Government team for the Safeguarding of Angkor (the JSA) has described the temple as "the most striking expression of the baroque style" of Khmer architecture, as contrasted with the classical style of Angkor Wat.
The temple is orientated towards the east, and so its buildings are set back to the west inside enclosures elongated along the east-west axis. Because the temple sits at the exact centre of Angkor Thom, roads lead to it directly from the gates at each of the city's cardinal points. The temple itself has no wall or moats, these being replaced by those of the city itself: the city-temple arrangement, with an area of 9 square kilometres, is much larger than that of Angkor Wat to the south (2 km²). Within the temple itself, there are two galleried enclosures (the third and second enclosures) and an upper terrace (the first enclosure). All of these elements are crowded against each other with little space between. Unlike Angkor Wat, which impresses with the grand scale of its architecture and open spaces, the Bayon "gives the impression of being compressed within a frame which is too tight for it."