What is "mannomun"

Manno Gate is the old south gate of the city of Yŏngbyon. Dating to the Joseon Dynasty, the gate was first constructed in 1658, and later rebuilt in 1789. Once guarding the road to Pyongyang, it bears a striking similarity to Pyongyang's Taedong Gate. It features a granite base topped by a two-story pavilion, the upper part of which bears a sign marking the gate as the old Yŏnju Castle Gate .