A poru is a wooden structure positioned on the bastion, a protruding section of the fortress wall, for overwatch. Dongiporu, one of five such posts at Hwangseong Fortress, was built to defend Bongdon (Beacon Tower). Located between Hwaseomun (West Gate) and Janganmun (North Gate), it was built in July 3, 1796 (the 20th year of King Jeongjo’s reign).