Jangsu, the twentieth monarch of Goguryeo, the…

Jangsu, the twentieth monarch of Goguryeo, the northernmost of the Three Kingdoms of Korea, has reigned from the age of nineteen reigned over the peak of Goguryeo's power, building on the territorial expansion of his father, King Gwanggaeto the Great.

Now entering his thirties, he has dedicated much of his efforts towards stabilizing a kingdom that had experienced great and sudden growth, a direct result of his father's conquests.

Jangsu has built a magnificent tomb for his father, and along with it an imposing four-meter tall tombstone carved from a single mass of granite and engraved with his father's accomplishments (now known as the Gwanggaeto Stele).

Of such imposing dimensions is the tomb and its grounds that it requires three hundred and thirty people to tend it at all times, called from different regions and tribal backgrounds to guard and clean the tomb in perpetuity: a demonstration of the effective consolidation of the Goguryeo kingdom and monarch's power at the time of Jangsu's succession.

In 427, he transfers the Goguryeo capital to from Guknaesong (modern Ji'an on the Sino-Korean border) to …