
Tour Anneessens, a corner tower and vestige of the first city wall (11C-13C) of Brussels. The wall was 7 meters high and 2,3 meters thick. It stretched for 4 km around the city. There were only 7 gateways to access the city. From high up on one of the 50 fortification towers, soldiers watched over the countryside, ready to respond to any sort of aggression.

The Halle Gate (French: Porte de Hal) is a former medieval city gate and the last vestige of the second walls of Brussels. It was built between 1381 and 1383 and restored in the 19th century in its current neo-Gothic style by the architect Henri Beyaert. It is now a museum dedicated to the medieval City of Brussels.