The
second walls of Brussels (, ) were erected between 1356 and 1383. The wall was to have a length of nearly 8 km (5 mi), which was enough to enclose the surrounding
hamlets and fields that supplied the city. There were to be 72 semicircular towers along the wall. There were seven main gates, corresponding to the seven entries into the first walls of Brussels, but the similarities mostly end there. The second walls were a monumental project and represented a colossal undertaking for the period. The design was fairly typical of
medieval defences before the introduction of gunpowder, and was surrounded by a
moat in the lower parts of the city. The two sets of walls coexisted until the 16th century, when the original set of walls began to be dismantled. File:Brussel.1610.a.jpg|An engraving of Brussels showing the city's second walls, File:Wenceslas Hollar - Brussels (State 1).jpg|17th-century engraving of Brussels' second walls, by
Wenceslas Hollar File:Jan Baptist Bonnecroy - Vue de Bruxelles.jpg|
Panoramic view of Brussels and its walls in the 17th century, by
Jan Baptist Bonnecroy Evolution of defences . The white areas in the centre are the areas destroyed. Monterrey Fort is visible on the right. North is roughly to the bottom-left. In the 16th century, there were seven gates:
Laeken,
Flanders,
Anderlecht,
Halle,
Namur,
Leuven and
Schaerbeek, each named for the direction of the road leading out of the gate. An eighth was added in 1561, the Shore Gate (, ), designed to control access to the
Port of Brussels from the newly constructed
Willebroek Canal. In the 16th and 17th centuries, new
siege weapons and techniques, including the advent of
artillery, forced the city to modernise the defences in order to keep potential attackers at a safe distance from the walls, including the addition of ditches,
bastions and
ravelins. The was the most important defensive work, its name coming from the
Spanish count responsible for modernising the defences. The fort was built between 1672 and 1675, by the
military engineers Merex and Blom, on the heights of
Obbrussel (, for "Upper Brussels", now
Saint-Gilles), south of the
Halle Gate. The dismantling work of the exterior defences began in the east of the city. The Fort of Monterey was sold and destroyed, and all of the Gates were
razed with the exception of the
Laeken Gate and the
Halle Gate. In 1795, when
Republican France invaded and
annexed the Low Countries, the demolitions were stopped, not resuming until an order from
Napoleon in 1804. The Laeken Gate was demolished in 1808. By an
ordinance on 19 May 1810, the French Emperor ordered the second walls demolished and replaced by boulevards with a
median in the centre. The fall of the
First French Empire prevented the project's immediate execution. ==Construction of the Small Ring==