Hwaseong Fortress has five secret gates for the passage of people, cattle, and military supplies. Constructed on March 27, 1796, in the 20th year of King Jeongjo’s reign, between Suwon Banghwasuryujeong((Northeastern Pavilion) and Dongbukporu (Northeastern Sentry Post), Bukammun is the only structure with brick walls at Hwaseong Fortress.