The Department of Fine Arts has undertaken the restoration of Prasat Phnom Rung since the declaration of the ancient monument of Phnom Rung in the Government Gazette, volime 52, section 75, dated 8th March 1935. Major restoration was carried out between 1971 and 1988. Then the Department of Fine Arts declared its boundry, about 178 acres, in the Government Gazette, volume 93, section 141, dated 9th November 1976, and organized the Phnom Rung historical park project which was officially opened by Her? Royal Highness? Princess? maha? Chakri? Sirindhornon 21st May, 1988.