Old buildings and remains of castle on the hill dating back to Koguryo Kingdom (B.C. 277-A.D. 668) have been preserved in their original state, under the Workers' Party of Korea's policy of preserving the nation's cultural heritage.

According to Kim Yong Chol, director of the Pyongyang City Management Office for the Preservation of National Heritage, President Kim Il Sung gave an important teaching in September 1946 as regards the preservation of historical sites and remains on Moran Hill.

But most of them were roughly destroyed or burnt out by indiscriminate bombing of the U.S. imperialists during the 1950-1953 Korean War. They were restored three years after the war, thanks to the state measure.

Later, such historical buildings as Ulmil, Choesung, Chongryu and Pubyok pavilions and Jongum, Hyonmu and Chilsong gates were mended several hundred times.

Artists and many other experts of the office have devoted their sincere efforts to preserving the historical sites and relics on the hill for decades.

The office conducts the colorful painting and other maintenance work for all the historical sites and relics on a scientific and normal basis and pays attention to educating visitors to the hill in the spirit of taking good care of the sites and relics, the director told KCNA.