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A rock castle ((ドイツ語:Felsenburg)) is a type of medieval castle that directly incorporates natural rock outcrops into its defences to such an extent that the rock formations define the structure of the castle. Topographically rock castles are classified as hill castles. == Layout == By contrast with the usual hill castles, that utilize the bedrock as a foundation for the individual buildings, the entire structure of rock castles is shaped by natural, often isolated rock formations, such as rock towers or crags. Typically a rock castle was built on a rock that was able to provide a fortified position without any great additions. In simple fortifications of this type the rock could be climbed on simple ladders that were hoisted up in times of danger. Rock castles would also have wooden and stone structures built on or against them. The morphological characteristics of the rock were crucial to the extent and nature of any structures. The rock on which the castle stands is always incorporated into its design. If the rock is easy to work (e.g. sandstone), rooms, passages, steps, well shafts and cisterns were invariably hacked out of it. The buildings, made of wood or stone, stood on or next to the rock and used it as a foundation or walls. The remains of wooden structures are not usually preserved today, but their location and appearance can be partially gauged by the joist bearings and joist holes still visible in the rock. Rock castles occur in large numbers in the southern Palatinate (Palatinate Forest), in northern Alsace (North Vosges) as well as in North Bohemia and Saxon Switzerland, where great sandstone rocks provide the necessary prerequisite for their construction. Most rock castles no longer exist today. Often the site was slighted and then used by local residents as a stone quarry, so that apart from man-made alterations to the rocks themselves, only a few traces are still visible. However, several rock castles, like the ruins of Neuwindstein still have impressive wall remains. A few rock castles were rebuilt in more recent times, e. g. Berwartstein Castle at the end of the 19th century and the imperial castle of Trifels Castle, which was to have become a "site of national remembrance" (''nationalen Weihestätte'') during the Nazi era. In both cases it was not a reconstruction of the medieval fortification but a contemporary new design. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rock castle」の詳細全文を読む スポンサード リンク
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