Gaugrehweiler is a municipality in the Donnersbergkreis district, in Rhineland-Palatinate, Germany.
Between 1749 and 1756, count Carl Magnus von Rheingrafenstein constructed Schloss Gaugrehweiler. It was demolished in the 1790s, following the French conquest of the region. Little of the palace survives above ground today, though archaeological and architectural remnants remain in the village center.
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