Hanoi Flag Tower

The Flag Tower of Hanoi is one of the symbols of the city and once a part of the Hanoi Citadel.
The tower was built in 1812 during the Nguyen dynasty as an observation post to the Hanoi Citadel. Unlike many other structures in Hanoi, it was not destroyed during the French invasion (1896-1897), and was continuously used as a military post. It is now located in the Vietnam Military History Museum.