Phimeanakas ('celestial temple') at Angkor, Cambodia, is a Hindu temple in the Khleang style, built at the end of the 10th century, during the reign of Rajendravarman (from 941-968), then rebuilt by Suryavarman II in the shape of a three tier pyramid as a Hindu temple. On top of the pyramid there was a tower.

According to legend, the king spent the first watch of every night with a Naga girl in the tower, during that time, not even the queen was permitted to intrude. Only in the second watch the king returned to his palace with the queen. If the naga who was the supreme land owner of Khmer land did not show up for a night, the king's day would be numbered, if the king did not show up, calamity would strike his land

Phimeanakas was constructed as a state-temple by Suryavarman and was the first palace to be built within fortifying walls, it later became absorbed into Angkor Thom which was built around 200 years later. There was a golden tower that crowned the temple and legend has it the temple was home ta a spirit which took the form of a serpent by day and a beautiful woman by night. The king had to visit this beautiful woman every night, if he failed to turn up disaster would follow. Phimeanakas is the tallest scalable temple in Angkor Thom providing great views from the top