Hwaseomun Gate is the western gate of Hwaseong Fortress.
Construction started on July 21, 1795 and was completed on January 8, 1796. The name of those who were involved with construction are inscribed on a plaque on a nearby stone wall. This is similar to the plaque found at Changnyongmun Gate.
A single level tower with a wooden pavilion can be found above the mujigae. A mujigae is a stone rainbow door. A crescent wall, opened on one side, extends out which is different that the design of Paldalmun Gate.
Over the years, the stone structure has been well preserved. It has been designated National Treasure Number 403.