Trade name: voděradský pískovec
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| Object: | Hrad |
| Architectural Element: | Castle |
| Architectural Object: | Castle |
| Address: | Frýdštejn |
| District: | Jablonec nad Nisou |
| Region: | Liberecký |
| State: | CZECH REPUBLIC |
| Way of Utilization Description: | Z pískovců byl vystavěn hrad. |