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Luxembourg (Luxembourgish: Lëtzebuerg, French: Luxembourg, German: Luxemburg), also known as Luxembourg City (Luxembourgish: Stad Lëtzebuerg or d'Stad, French: Ville de Luxembourg, German: Stadt Luxemburg, Luxemburg-Stadt), is the capital city of the Grand Duchy of Luxembourg and the country's most populous commune.
Standing at the confluence of the Alzette and Pétrusse rivers in southern Luxembourg, the city lies in the center of Western Europe, located 213 km (132 mi) by road from Brussels, 372 kilometers (231 mi) from Paris, and 209 km (130 mi) from Cologne. The town comprises Luxembourg Castle, established by the Franks in the Early Middle Ages, around which a settlement developed. As of 31 December 2019, Luxembourg City has a population of 122,273 inhabitants, which is more than three times the population of the country's second most populous commune (Esch-sur-Alzette). The city's population includes 160 nationalities.Heidelberg | |
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Heidelberg ( HY-dəl-burg, German: [ˈhaɪdl̩bɛʁk] (listen)) is a university town in the German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. In the 2016 census, its population was 159,914, of which roughly a quarter consisted of students.Located about 78 km (48 mi) south of Frankfurt, Heidelberg is the fifth-largest city in Baden-Württemberg. Heidelberg is part of the densely populated Rhine-Neckar Metropolitan Region.
Heidelberg University, founded in 1386, is Germany's oldest and one of Europe's most reputable universities. Heidelberg is a scientific hub in Germany and home to several internationally renowned research facilities adjacent to its university, including the European Molecular Biology Laboratory and four Max Planck Institutes.