Pískovce Vladislavského sálu na Pražském hradě
Jan Šrámek
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Sandstones of the Vladislavský Hall at Prague Castle, Czech Republic For the Late Gothic ribs of the Vladislav Hall were used quartz sandstones from Nehvizdy, Vyšehořovice or Chvaly. Whitish-gray or yellowish sandstones in a course of quick heating use to break and fall off. Thus it was recommanded to prolong heating and lowered temperature under 80° C.