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Origin and history

The fortifications of Avesnes-sur-Helpe are a defensive whole whose origins date back to the Middle Ages. A 12th century dungeon and vestiges of the medieval enclosure have been discovered since 1975. These elements testify to the strategic importance of the city from this time on, although few precise architectural details are kept for this period.

In the 16th century, the Spanish, then masters of the Spanish Netherlands, built a new enclosure to modernize the city's defences. These fortifications were rebuilt in the 17th century, with elements still visible today, such as the Porte de Mons, the bastion of the Reyne, or the bastions of France and Saint John. This work reflects the evolution of military techniques and the conflicts of the time, particularly the Franco-Spanish wars.

Protected remains include a variety of features: casematized bastions, half moons, ditches, and counterscarps. The Gate of Mons, classified in 1944, and the remains of the feudal dungeon, classified in 1981, illustrate the superposition of the epochs. Other parts, such as the water entrance lock or guard corps, were listed in 1995, highlighting the heritage richness of the site. These fortifications thus combine medieval heritage and adaptations of modern times.

The property of the fortifications is now shared between public (municipal, departmental) and private actors (corporations, associations). Their varying state of conservation, noted as "a priori satisfactory" (level 7/10), makes it possible to envisage tourist or cultural valuations. However, their access remains conditional on their status as a mixed property, without clear indication of the possibilities of visitation or current use.

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