1841, a key date in the history of our beautiful city, which marks the beginning of a long series of transformations, renovations, demolitions and constructions
Since that day, Mondorf-les-Bains has not stopped, in spite of many hazards, to make every effort to become what it is today, that is to say a special destination where everyone finds its own pleasure.
Here is a small history from 1841 to today.
| 1841 | Beginning of drilling at the origin of the first thermal spring (for the search of rock salt). |
| 1846 | After 5 years of effort, discovery of the first thermal spring: the Kind source at a depth of 736 m (world record) • Birth of the spa. |
| 20th June 1847 | Inauguration of the first thermal establishment. |
| 1852 | 1st request for the establishment of a gambling casino by the brothers Blanc and opening of the Hotel du Grand Chef. |
| 1864 | Mondorf already had 8 hotels in this year : Hôtel de l'Etablissement at the Thermal Park, Hotel de l'Europe, Hotel du Grand Chef, Hotel du Commerce, Hotel de France, Hotel du Nord, Hotel des Bains and Hotel de Luxembourg. |
| 15th November 1864 | Mondorf spring and outbuildings are sold to a group of capitalists "Société anonyme des Bains de Mondorf" |
| 27th August 1868 | Birth of John Grün in Mondorf-les-Bains (later known as the strongest man in the world). |
| 28th August 1878 | the Spa resort town is authorized by Grand-Ducal royal decree to take the denomination of : Mondorf-les-Bains. |
| 21st April 1886 | Vote of a bill that concerns the resumption of the thermal establishment by the State. |
| 1900 | Creation of a Mondorf thermal water bottling station for sending to individuals in Luxembourg and abroad. |
| 1901 | The industrialist Charles Bettendorf starts in the construction of 5 houses of character : the Art Nouveau style. |
| 1903 | Inauguration of the railway line linking Mondorf to Thionville. This line was called "Thionville / Mondorf-les-Bains secondary railway". |
| 1907 | Construction of the synagogue. Consecrated on September 26, 1908 in the presence of the rabbi Fuchs, it is the symbol of the first generation of Jews installed in Mondorf-les-Bains. |
| 1909 | Inauguration in the thermal park of the monument dedicated to Dr. M. Klein. |
| 05-12th June 1910 | Aviation Week under the auspices of the Aéro-club of the Grand Duchy of Luxembourg in Mondorf-les-Bains. |
| 03rd November 1912 | Death of John Grün. |
| 1913 | Drilling of a second source : the Marie Adelaïde spring at a depth of 464 meters. |
| 1920 | Inauguration of the first monument John Grün. |
| 1926 | Inauguration of the Palace Hotel as well as the new hydrotherapy, now known as "Al Thermen". |
| Between 1939 and 1945 | Occupation of Mondorf-les-Bains by the German Reich. After May 08, the city hosted the 59 survivors of the elite of the 3rd Reich. |
| May-November 1945 | The Palace Hotel is transformed into a preventive prison for former Nazi criminals before their trial in Nuremberg. |
| 1948 | Purchase by the State of the Palace Hotel, put under sequestration after the war to install the administration of Mondorf-State, as well as the medical institute and the dance and reading rooms. |
| 1963 | Inauguration of the new pavilion overlooking the Kind spring. |
| 1975 | Construction of the water tower serving Mondorf-Etat in drinking water. |
| 1979 | Drilling of the source Michel Lucius. |
| 16th April 1983 | CASINO 2OOO opens its doors 128 years after the first application (authorization dating from 1980). |
| 1st May 1988 | Official inauguration of the new thermal and health center. |
| 2002/2003 | Renovation of the Orangery and creation of the French Garden just in front of its doors. |
| 18th March 2009 | The foundation stone of the CHAPITO, event space of the CASINO 2OOO, was laid. |
| 15th November 2011 | Official inauguration of CHAPITO after 31 months of construction. |
| 24th April 2015 | Visit of the cosmonaut Alexei Leonov, the first man to be released in space on March 18, 1965, at the Fligermusée of Mondorf-les-Bains. |
| 05th May 2015 | Inauguration of the new Espace Saunas by Mondorf. Development of the outdoor areas of the Wellness section (9 saunas, hammam in the cave, variable temperature water basin, numerous rest areas). |
| 23th June 2015 | Official opening of the Grand Duchess Maria Theresa school complex in the presence of the Duke and Grand-Duchess of Luxembourg. |
| 23rd September 2015 | Inauguration of the Mondorf Parc Hotel ****. Conversion and refitting of all rooms (108), bar and lounges located on the ground floor of the hotel. |
| 13rd May 2016 | Inauguration of the Clara Reinert garden at the entrance of Mondorf-les-Bains (from Altwies) Clara Reinert (1888-1968) was a midwife who lived in Mondorf-les-Bains rue du Moulin and Having helped to give birth to many in this world. |
| 16th June 2016 | Inauguration of the new Roseraie (thermal park) More than 200 varieties of roses with more than 3000 rosebushes. |