City of Luxembourg: its Old Quarters and Fortifications

The City of Luxembourg: its Old Quarters and Fortifications is a UNESCO site that preserves a medieval urban core together with extensive defensive works developed between the Middle Ages and the 19th century. The ensemble includes visible ramparts, subterranean casemates and historic urban fabric arranged on steep river valleys.

The Old Quarter retains narrow streets, churches and civic buildings that reflect the city’s long role as a strategic fortress and administrative centre. The fortifications include bastions, curtain walls and a network of galleries that were adapted by Spanish, French and Austrian authorities across centuries of military innovation.

The defences exploited the natural topography of promontories and river valleys, creating layered protection and underground shelters that were modified into the 19th century. The urban area grew in the spaces between and beneath these works, producing a concentration of historical strata.

Luxembourg City sits in southern Luxembourg at the confluence of the Alzette and Pétrusse rivers, with the Old Quarters perched on steep slopes and promontories above the valleys.

• Fortification note: The city's fortifications were expanded and adapted by successive European powers, with the casemates forming a notable system of underground passages and defensive chambers beneath the rock outcrops.

What to See #

• Old Quarter: Old Quarter - a compact medieval and early modern urban area with narrow streets, domestic architecture and public buildings reflecting continuous occupation and adaptation over centuries.
• Fortifications and casemates: Fortifications and casemates - a network of defensive works including bastions, towers and underground galleries that illustrate the city's strategic military role from the Middle Ages to the 19th century.
• Bock promontory: Bock promontory - a rocky outcrop that forms one of the city's oldest fortified positions and provides views over the rivers and surrounding valley.