Pyongyang Castle

Pyongyang Castle is a Goguryeo-period fortress in Pyongyang, North Korea, designated as National Treasure No. 1 in 1994. Spanning approximately 15 kilometers in circumference, the fortress became the kingdom's capital in 427 AD when King Jangsu transferred the seat of power from Gungnae Fortress. The castle's construction integrates natural rock formations into its defensive walls, with stone masonry nearly indistinguishable from bedrock in places. It housed nine temples built during King Gwanggaeto's reign and served as both a military stronghold and administrative center.