Preah Ko was the first temple to be built in the ancient and now defunct city of Hariharalaya (in the area that today is called Roluos), some 15 kilometers south-east of the main group of temples at Angkor, Cambodia. The temple was built under the Khmer King Indravarman I in 879 to honor members of the king's family, whom it places in relation with the Hindu deity Shiva.
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