Schloss Weissenstein
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The castle "Schloss Weissenstein" in Pommersfelden in Bavaria was designed by Johann Dientzenhofer and Johann Lukas von Hildebrandt.
The castle was built between 1711 and 1718 from the local Burgsandstein and Schilfsandstein (sandstone) materials. [1] Schloss Weissenstein is located in a rural area in southern Germany, which does not have industrial air pollution. During a restoration of the castle in 1977, the mortar joints were repaired using lime-cement-mortars, and large areas of the facade were then consolidated and treated hydrophobically using silicone products. In November 1998, some treated and untreated mortars were sampled by three scientific partners of the University of Hamburg, to compare the microbial colonisation and to enrich and isolate microorganisms from the silicone treated material.