Baden-Baden - Wikipedia
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Baden-Baden is a spa city in Baden-Wurttemberg (German pronunciation: [ba:dn]) located at the northern border of the Black Forest mountain range, on the small river Oos. It can be found ten kilometres (six mile) east of Rhine, France's border, and forty kilometers (twenty-five mile) north-east from Strasbourg, France.
The town was added to the transnational UNESCO World Heritage Site in 2021 under the title \"Great Spa Towns of Europe\" because of its famed spas and architecture, which exemplifies Europe's popularity of spa towns from the 18th to 20th centuries. 
The springs at Baden-Baden were known to the Romans as Aquae (\"The Waters\") and Aurelia Aquensis (\"Aurelia-of-the-Waters\") after M. Aurelius Severus Alexander Augustus. 
Baden in modern German is a noun that means \"bathing\". However, Baden, the original town name, derives its origins from a pluralized Bad (\"bath\") form.  Modern German uses the plural Bader.  Other Badens can be found at hot springs in Central Europe, just like the English name \"Bath\". To distinguish it from other Badens, especially Baden near Vienna in Austria or Baden near Zurich (Switzerland), the current doubled name was created. Split into many territories by the original Margraviate, Baden (1112-1535) The Margraviate Baden-Baden (1535-1771) was distinguished by the name \"Baden-Baden\". The name \"Baden-Baden\", which refers to Baden in Baden's territory, was a reference to the Margraviate Baden-Baden, which meant \"the Margraviate at Baden with its princely Seat at Baden.\" Baden-Baden was officially given its current name in 1931.