| Idstein Castle | |
|---|---|
| |
 Castle building and Hexenturm | |
 | |
| General information | |
| Type |
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| Architectural style | |
| Location | Idstein, Hesse, Germany |
| Coordinates | 50°13′19″N 8°16′08″E / 50.2219°N 8.2688°E |
| Groundbreaking | c. 1070 |
Idstein Castle (German: Burg Idstein), later the Renaissance style Schloss Idstein, is located in Idstein in the county of Rheingau-Taunus, Germany. The hill castle was the residenz of the counts of Nassau-Idstein. The castle's Witches' Tower (Hexenturm) is one of the town's oldest buildings and a substantial local landmark.