Among the cultural heritage of the Korean nation are the mural tombs of Koguryo (277 BC -668 AD), the first feudal state of Korea.
The tombs, showing high skills of architecture and painting of the people of Koguryo, are preserved well according to the DPRK policy on national relics.
The 28th session of the UNESCO World Heritage Committee decided in July 2004 to register 63 mural tombs of Koguryo as world cultural heritage for the diversified structure of coffin chambers and the rich contents of the murals.