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Photo: Natacha Eve, CC BY-SA 3.0 via Wikimedia Commons
Constructed between 1881 and 1884 as a Belgian defensive measure against Germany, Fort de Loncin was attacked during the Battle of Liège, the first battle of the invasion of Belgium during the First World War. While a pinnacle of fortification throughout the 1880s, it was destroyed by the largest artillery pieces of the German field army, showing the rapid developments of the late nineteenth century and the technological warfare of the First World War. While defeated, the valiant defense of Liège delayed the German assault on France by four to five days, giving the Entente time to prepare their defenses. The remnants and ruins of the fort still remain as well as a museum and monument.
The Fort de Loncin is one of twelve forts built around Liège, Belgium, in the late 19th century. The overall Fortified Position of Liège was a constituent part of the country's National Redoubt. Fort de Loncin was constructed between 1881 and 1884 according to the plans of General Henri Alexis Brialmont. Contrasting with the French forts built in the same era by Raymond Adolphe Séré de Rivières, the fort was built exclusively of unreinforced concrete, a new material, rather than masonry.
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Opéra Royal de Wallonie
Composed of the Palace of Justice (classic façade at Place Saint Lambert 18) and the Provincial Palace (lateral neo-gothic façade at place Notger 2). This palace is the heart of the city, and represents the political power of the old Prince-Bishops of Liège.
An underground archaeological site with the remains of the three (successive) cathedrals on the site, as well as a building from Roman times.
Musée de la Vie Wallonne
An ethnological museum hosted in an old convent.
Mountain of Bueren and the slopes of the Citadel
Climb the imposing staircase of 373 steps framed by small houses and gardens, or opt for the smaller streets and stairways leading up to the Citadel's slopes. From the top, you'll have a lovely view of the city, from the Palace roofs to the ancient watchtower.
It will be integrated into the future Museum Grand Curtius, but can now be visited separately.