Angkor is a region of Cambodia that housed the successive capitals of the Khmer Empire during its heyday. The so-called Angkorian Empire dominated Southeast Asia, from the China Sea to the Bay of Bengal, between the 9th and 15th centuries AD. Its monuments and temples, declared a World Heritage Site by UNESCO in 1992, are located near the current city of Siem Riep.This area has been recovered from the jungle recently, with the exception of its most important temple, the Angkor Wat temple which, although originally dedicated to the Hindu god Vishnu, was never abandoned, having been maintained for centuries by Buddhist monks. Angkor is an ancient Sanskrit word for city; The words thom and wat are from the current Khmer language for "big" and "pagoda" respectively. Thus, Angkor Thom can be understood as the Great City and Angkor Wat as the Temple City.Angkor Wat is the largest and best preserved Hindu temple of those that make up the settlement of Angkor. It is considered the largest religious structure ever built and one of the most important archaeological treasures in the world. The promoter of this gigantic temple was Suryavarman II. It covers an area of 200 square kilometers, although recent research speaks of a possible area of 3,000 square kilometers and a population of up to half a million inhabitants. It was the political and religious center of the Empire. The enclosure served as the main temple and also housed the royal palace. Despite the decline of the Empire and the abandonment of the temples over the centuries, Buddhist monks remained at Angkor Wat until the French rediscovered it. Various teams from various countries have intervened and restoration work in the temple is still continuing: a German team was in charge of restoring the reliefs of apsaras; An Italian team was in charge of the lake and several Japanese teams have carried out different interventions, highlighting the restorations of the northern corner of the west wall begun in 1995 and of the northern library. It has become a symbol of Cambodia, to the point of appearing on the country's flag. The well-known 5 towers represent the 5 peaks of Meru, the walls surrounding them are the mountains and the valley surrounding them is the ocean.