The former is on a hill west of the ruins of the Anhak Royal Palace at the foot of Mt. Taesong and the latter is about 250 meters west of the western gate of the palace.

The earthen tomb consists of a passage and a square stone chamber.

The chamber is 3.1 meters long from south to north and 3.05 meters long from east to west, and its remaining wall is 1.6 meters high. The passage leading to the chamber is 3.05 meters long and 1.35 meters wide.

The mural painting has faded away except for green lotus patterns, black water-drop patterns, etc.

Dug out there were an axe-blade-shaped iron arrowhead, an iron nail and fragments of a broken dark grey pot.

The chomsongdae has a quadrangular main facility surrounded by a heptangular subsidiary facility.

Its total acreage is about 380 square meters. Each line of the heptangular stone facility is 9.1-9.2 meters long and the heptagon is about 20.6 meters in diameter.

As for the quadrangular facility, the south-north length is 7.5 meters and east-west length is 6.7 meters at the upper part, while 7.2 meters and 6.7 meters at the lower part respectively.

The walls of the main facility have layers of charcoal, gravel and lime. The charcoal part is 10.24 square meters.

So far chomsongdaes built in different periods have been found in the Korean peninsula, but it is the first time that Koguryo's chomsongdae was discovered.

The above-said relics are of significance in confirming the historic position of Pyongyang as a cradle of the nation and hub of national culture and in intensifying research into the history of Koguryo.