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The spa Bad Sauerbrunn is situated at an altitude of 280 m in the Mattersburg district of Burgenland. The mineral waters had alrady been used by the Romans. In modern times, the waters were used for therapeutic treatments again since 1847. When the German-speaking parts of western Hungary had become part of Austria in 1920, Sauerbrunn became the provisional seat of the government of the new federal state of Burgenland in 1921. The government and administration were moved to the definitive capital, Eisenstadt, in 1925.