Bayon (Khmer: ប្រាសាទបាយ័ន, Prasat Bayon) was built during the reign of the famous King JayavarmanVII in the late 12th century to early 13th century. Bayon is the heart of Angkor Thom capital city. It is a Buddhist temple and it was the last mountain temple in Khmer Arts and consecrated to the Buddhist cult. The Bayon Temple is very great with its age, beauty and its splendor in the Angkor Kingdom. This temple is one of the most famous after Angkor Wat, and millions of tourists come each year to see.
The Bayon was built nearly 100 years after Angkor Wat temple. While its basic structure and earliest part of the temple are unknown, it is clear that Bayon temple was built on the top of an earlier monument and that the temple was not built one time. It was the Gold Tower with four faces and there are 54 tower which represent the Khmer provinces in the Great Khmer Empire Period (Angkor period). The iconography of the four faces represent the Bodhisattva Avalokiteshvara – Lokeshvara – and it is generally accepted that the four faces on each of the towers are images of King Jayavarman VII, which means the omnipresence of the king. And it also symbolizes the four smiling face as charming smile, sad smile, glad smile and beautiful smile. There are about 216 faces.