Angkor Wat ("City/Capital of Temples") is a temple complex in Cambodia, located on a site measuring 402 acres. The Guinness World Records considers it as the largest religious structure in the world. Originally constructed as a Hindu temple dedicated to the god Vishnu for the Khmer Empire by King Suryavarman II during the 12th century, it was gradually transformed into a Buddhist temple towards the end of the century; as such, it is also described as a "Hindu-Buddhist" temple.

Angkor Wat was built at the behest of the Khmer King Suryavarman II in the early 12th century in Yaśodharapura (Angkor), the capital of the Khmer Empire, as his state temple and eventual mausoleum. Angkor Wat combines two basic plans of Khmer temple architecture: the temple-mountain and the later galleried temple. It is designed to represent Mount Meru, home of the devas in Hindu mythology: within a moat more than 3 miles long and an outer wall 2.2 miles long are three rectangular galleries, each raised above the next. At the centre of the temple stands a quincunx of towers.