Luxembourg — Capital of Luxembourg

Luxembourg City sits at the intersection of European history and modern financial power in a way few cities can match. Built on a dramatic rocky promontory cut by deep river gorges, the city's old quarters and fortifications earned UNESCO World Heritage status — and the nickname 'Gibraltar of the North'. Beneath the sandstone cliffs runs the Bock Casemates, a labyrinth of underground rock tunnels extending some 23 kilometres, originally carved for military defence and used as bomb shelters during World War II. Today visitors can walk through sections of this subterranean network directly beneath the city's medieval streets.

Luxembourg holds a singular distinction: it is the only remaining sovereign Grand Duchy in the world. Historically there were many — grand duchies across Europe — but Luxembourg alone has survived as an independent state with a Grand Duke as head of state. The current Grand Duke Henri has reigned since 2000. The tiny nation — with a population of around 660,000 — is bordered by Belgium, France, and Germany, and its strategic position has made it a crossroads of European history for centuries.

In the modern era, Luxembourg punches well above its weight. It is consistently among the top three countries globally by GDP per capita, driven by a dominant financial services sector. Luxembourg City is the seat of the Court of Justice of the European Union and the European Court of Auditors — making it, alongside Brussels and Strasbourg, one of the EU's three principal capitals. Luxembourg was a founding member of the EU, NATO, the Eurozone, and the Schengen Area. Notably, the Schengen Agreement itself was signed in 1985 in the small Luxembourg town of Schengen, on a boat in the Moselle River.

Luxembourg has three official languages: Luxembourgish, French, and German — and most citizens speak all three fluently, along with English. Robert Schuman, one of the founding fathers of the European Union and the author of the 1950 Schuman Declaration that proposed the European Coal and Steel Community, was born in Luxembourg City. The city's cosmopolitan character is reinforced by the fact that nearly half its residents are foreign nationals, giving it one of the highest proportions of immigrants of any European capital.