Ernst-Ludwig-Heilstätte, Historical sanatorium in Sandbach, Germany.

Ernst-Ludwig-Heilstätte is a medical facility dating to around 1900 with a long facade featuring three gabled staircases and architectural details from that era. The grounds also included agricultural buildings with vegetable gardens and stables that supported the facility's self-sufficiency.

The facility opened in 1901 as a treatment center for tuberculosis patients under the management of Invalidenversicherungsanstalt Großherzogtum Hessen. It embodied a new approach that promoted spacious, work-focused layouts as the path to modern medical care.

The name honours Grand Duke Ernst Ludwig, who attended the 1901 inauguration; the main building had been finished only by working through the night before the ceremony. The clinic drew spa guests from the Ruhr, especially miners with silicosis, and its therapy replaced the usual lying cure with a strict work cure meant to prevent boredom and keep discipline. A small farm with vegetable beds and stables supplied the house.

The clinic is an operating hospital, so the grounds and buildings are not open to visitors; the complex lies at the end of a valley north of Sandbach, in the Breuberg district. The two surviving side buildings by Viktor von Weltzien can be seen from outside: the former chief physician's villa with its stepped gable and stair turret, and the administrator's house with its Swiss-style loggia gable.

The complex was designed by Victor von Weltzien, who directed the Hessian state construction administration and oversaw the project for Berlin architects Gropius & Schmieden. His design already showed forward-thinking ideas about connecting building layout with healing effects.