The city of Luxembourg is the capital and largest city of a small country in northwestern Europe that is also called Luxembourg. The city lies in the south-central part of the country, rising in tiers on a sandstone plateau. The upper and older part of the city is separated from the lower-lying suburbs by the gorges of the Alzette and Petrusse rivers. Carved into the river valley’s sandstone cliffs is a newer section of the city that houses many European organizations. Several bridges link the different sections of the city.

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The old town of Luxembourg city was designated a UNESCO World Heritage site. The medieval city formed around Luxembourg Castle, which was built on a rocky promontory called the Bock (Bouc). The old town consists of the castle’s remaining fortifications and many other historic buildings, including the Grand Ducal Palace. The palace, built in 1572, is home to the country’s royal family. Notre-Dame Cathedral, completed in 1621, is a Gothic-style church containing the tomb of John the Blind, a 14th-century king of Bohemia and count of Luxembourg. Several members of the royal family and noted bishops are buried in the crypt. The heart of the city’s old town is the Fish Market (Marché-aux-Poissons), around which stand several 17th- and 18th-century buildings. Also at the Fish Market is the city’s oldest building, Um Bock, which dates to the 13th century.

Among the city’s many museums is the Luxembourg National Museum (National Museum of History and Art), which is housed in an old mansion at the Fish Market. The city’s other cultural institutions include the Villa Vauban–Museum of the Art of the City of Luxembourg, the MUDAM Luxembourg (Grand Duke Jean Museum of Modern Art), the Museum of the History of the City of Luxembourg, and the National Museum of Natural History. Just to the east of the city, at the town of Hamm, is a World War II military cemetery. In the cemetery are the graves of more than 5,000 U.S. soldiers, including those of Brigadier General Edward Betts and General George S. Patton.

Luxembourg city is a major financial center. The country’s banking laws keep the identities of investors secret and allow the accounts of foreign nationals to earn interest tax-free. Many international industrial and financial corporations maintain offices—often as their European headquarters—in Luxembourg city. The city is also the seat of the European Investment Bank, the European Court of Justice, and several other administrative offices of the European Union. Luxembourg city has long been a major road and railway hub. The University of Luxembourg was established in the city in 2003.

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The city traces its history back to fortifications built on the rocky promontory, which provided a natural defensive position. It was the site of a Roman fort and later a Frankish castle. In ad 963 Siegfried, count of Ardennes, the founder of Luxembourg’s royal family, purchased this castle. The castle’s old name, Lucilinburhuc (“Little Fortress”), is the origin of the name Luxembourg. Over hundreds of years, Luxembourg Castle was repeatedly attacked and rebuilt until it became the strongest fortress in Europe after Gibraltar. The city and the rest of the country fell under Spanish, Austrian, French, and then Dutch rule. From 1815 to 1866 a Prussian military garrison was housed in the city. In 1867 Luxembourg became an independent country with Luxembourg city as its capital. The city’s fortress was then largely dismantled. Population (2014 estimate) city, 107,247; metropolitan area, 152,244.