Phnom Bok is a hill in the northeast of the East Baray in Cambodia, with a prasat (temple) of the same name built on it. It is one of a 'trilogy of mountains', each of which has a temple with similar layout. The creation of the temple is credited to the reign of Yasovarman I (889910) between the 9th and 10th centuries and was established after he moved his capital to Angkor and named it Yasodharapura. The two other sister temples, named after the contiguous hills, are Phnom Bakheng and Phnom Krom. The temple is an Angkor monument. It is dedicated to the Trimurti of the Hindu pantheon, Brahma, Vishnu and Shiva. It was built in Bakheng style (893927) and designed with individual sanctums, which have door openings to the east and west. These are raised on a foundation with a plinth made of laterite stone.