Angkor Wat was built for the king Suryavarman II in the early 12th century as his state temple and capital city, says Wikipedia.
It was first Hindu, dedicated to the god Vishnu, then Buddhist.
It is the world's largest religious building.[1]
It has become a symbol of Cambodia, appearing on its national flag, and it is the country's prime attraction for visitors.
The temple is admired for the grandeur and harmony of the architecture, its extensive bas-reliefs and for the numerous devatas (guardian spirits) adorning its walls.