Dongilporu (Eastern Sentry Post I) is a wooden structure built on top of square turret that is located south of Changnyongmun Gate. The wooden structure is known as a poru while the square turret is known as a chiseong.
There are five similar structures at Hwaseong. All are constructed of brick and positioned on turrets that protrude beyond the fortress walls. The strategic locations allowed for easy attacks by artillery on enemies below.
One unique feature for this structure is that it is has no wooden front doors. This allowed troops to have a 360 degree view of the surrounding area.
The stone juts further out beyond the fortress wall compared to Bukseoporu (Northwestern Sentry Post).
Construction was completed on July 10, 1796.