Flag Tower of Hanoi December 28, 2014April 2, 2016 Fabiano Maciel Experiences, Worth a Thousand Words Welcome to the last Sunday Pictures in December. My choice for this last post is the Flag Tower of Hanoi, in Hanoi – Vietnam. Flag Tower of Hanoi – in Hanoi, Vietnam The Flag Tower is part of Hanoi Citadel and was built in 1812. The tower is 33.4 meters high and holds the National Flag of Vietnam on its top.