En un regard
Le château en bref
The fortifications of Diest form a nineteenth-century defensive belt built between 1837 and 1856, after Belgian independence, to protect the northern border against a possible attack from the Netherlands. The trace, designed by Major Laurillard-Fallot, forms a twelve-sided polygon that combines several fortification systems. The citadel, built from 1846 to 1856 to plans by Lieutenant-Colonel E. De Lannoy, is the only surviving example of this type in Flanders and remains almost intact, with the exception of one bastion. More than a third of the original trace survives. Three fronts apply the theories of Montalembert, which makes Diest a direct forerunner of the Antwerp fortress designed by Brialmont. The surviving elements include the Schaffen Gate, the guardhouses of the Zichem and Louvain Gates, several postern gates with gun casemates, and a powder magazine, as well as the sluice of 1841, the only fan-shaped lock known in Belgium. The remains of this enclosure are protected as a monument by a Flemish decree of 20 May 1996.