Trade name: břvanská opuka ( též hrádecká opuka)
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| Object: | Kostel sv. Mikuláše |
| Architectural Element: | Staircase |
| Architectural Object: | Church |
| Address: | Louny |
| District: | Louny |
| Region: | Ústecký |
| State: | CZECH REPUBLIC |
| Way of Utilization Description: | stupně ve šnekovém schodišti ve věži kostela |
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| Photo: Jaroslav Valečka (2005) |