Beautiful cathedral and definitely one of the landmarks worth seeing when visiting Hanoi. I came in the evening, and the cathedral looked especially impressive with all the lights on. The old Gothic architecture, stained-glass window and the statue in front give the whole place a lot of character.The area around the cathedral was quite lively, with plenty of people taking photos and enjoying the evening. There are also lots of cafés and places to eat nearby, so it’s easy to include this as part of a walk around the Old Quarter.Worth visiting, and I think it looks particularly beautiful at night.