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Photo: The original uploader was Portzamparc Francais at French Wikipedia., CC BY-SA 2.0 fr via Wikimedia Commons
Classical concerts.
The Philharmonie Luxembourg, also known officially as the Grande-Duchesse Joséphine-Charlotte Concert Hall, is a concert hall located in the European district of Kirchberg in Luxembourg City. Opened in 2005, it now plays host to 400 performances each year.
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Musée d'Art Moderne Grand-Duc Jean
Designed by I.M. Pei of "Louvre Pyramid" fame, this museum showcases Luxembourgish artists and changing international exhibitions. The nonlinear (and rather confusing) building is half the fun, and on a quiet weekday afternoon in the off season you'll pretty much have the place to yourself.
Museum about the history of the Luxembourg Fortress inside an 18th century fort. Used to be free of charge, now 8€ entrance since 1/1/2026. Well worth a visit.
The rock on which the first castle stood, founded in 963 by Sigefroy (Sigfried). It is tied to a number of other remains of the old fortifications. Among others, the famous fortress builder Vauban built much in the city.
A network of underground fortifications, built in the 18th century. The fortifications and environs are recognized as a UNESCO World Heritage Site.