 In the 19th Century, the spa was acquired by Pastor Johann Christoph Blumhardt who used it as a centre for his ministry of healing and evangelism.His son Christoph Friedrich Blumhardt took over the spa and ministry until his own his death in 1919.In 1921, the Blumhardt family passed the spa complex on to the Herrnhuter Brüder-Unität or Moravian Church.