This three-story structure is
58 m long, 27.5 m wide, 17 m high and serves as the main
entrance to Imperial city.
There are five gates to Ngo Mon, with the central gate being
reserved for the kings only.
The two adjacent gates were
exclusively for court officials, and the two other outer
gates were used for servants and members of the royal entourage. On top of the arch in the Five Phoenix Tower where the king sat
during festivities.
This was also where ceremonies were organized to announce the names
of successful candidates of royal examinations. During the reign of the Nguyen Kings, Ngo
Mon Gate was only opened when the kings were passing by or
receiving foreign ambassadors.