Baden-Baden was founded by the Romans at the location of a former Celtic settlement. It was named ‘Citavis Aurelia Aquensis’ (the city of Aurelia of the waters) in honour of Aurelius Severus and Baden-Baden’s hot springs. Roman garrisons were stationed here from the second century BC onwards, and used the healing waters, above all, to cure war injuries. But the baths were also an important meeting place for relaxation and socialising, and luxury baths were built for emperors, soldiers and horses. Remains of the soldiers’ baths with sophisticated heating and water technology are still located below the Friedrichsbad. Emperor Caracalla (188-217 CE), in particular, rendered outstanding services to the luxurious expansion of the facilities in Baden-Baden.
In the Middle Ages, rheumatic complaints and injuries continued to be treated by bathing in the thermal waters. In 1112, Baden- Baden and the newly constructed Hohenbaden Castle served as the seat of the Margraves of Baden. The Lichtenthal Convent was founded in 1254. In the 14th century, the town was successfully flooded several times with thermal water as protection against epidemics. The baths also fulfilled many social and mystical functions! Depending on the physician and the progress of the research, the healing waters were used for treatment of many diseases, such as female infertility, gout resulting from excessive constipation, skin diseases and respiratory problems. In 1479, the seat of the Margraves of Baden was transferred to the New Castle of Baden-Baden.
Early Modern Period
Until the Thirty Years’ War (1618-48), Baden-Baden flourished as a bathing town. Around the mid-17th century, the richly stuccoed princely bath was built at the orders of Margrave Ferdinand Maximilian (1652-69) on the ground floor of the New Palace on Florentine Hill. In 1689, during the War of the Palatinate Succession (1688-1697) between France and the “Holy Roman Empire”, Baden-Baden was burnt to the ground by the French. Due to the Palatinate War the town lost its status as the capital of the Margraves of Baden that it had held since the 12th century. Although the city was partly rebuilt thereafter, the bathing system almost came to a standstill.
Age of Enlightenment
Baden-Baden’s resurgence as a spa town was initiated with the building of the Promenade House and the laying out of a chestnut lined avenue outside the city walls and west of the Oos River in 1765-66. This marked the beginning of a new spa quarter, which was not only soon to outstrip the spa quarter in the old town, but was also to lead to a shift in the focus of the city's structural, economic and social development. The town was rediscovered as a bathing resort by the participants of the Rastatt Congress of 1797-98, followed by artists of German Romanticism.
Summer Capital of Europe-I
From the dawn of the 19th century, the town was systematically transformed into a modern health resort. The old city gates and the city walls were demolished, and the town spread further into the Oos Valley and the surrounding landscape. The Promenade House was converted into the Konversationshaus (today's Kurhaus) by Friedrich Weinbrenner, the Grand Duke of Baden's building director, from 1821-24, and the Trinkhalle was built by Heinrich Hübsch from 1839-42. It was in the Kurhaus, and the Casino housed in the building, that Baden-Baden acquired a worldwide reputation as the supreme example of a gaming spa.
Summer Capital of Europe-II
The Franco-Prussian War (1870-71) and the ban on gambling in the German Empire in 1872 had a noticeable impact Baden-Baden's development. However, the city responded to this by returning to its centuries-old bathing tradition. Directly next to the thermal springs in the old spa quarter, the Friedrichsbad was built between 1869 and 1877. The monumental bathing temple met the most modern demands, and Mark Twain noted soon after its opening that in the new Friedrichsbad "you can take every bath ever invented".