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GreifensteinGrundriss. Grundriss der Burgruine Greifenstein in Thringen Floor plan of the castle ruin Greifenstein in Thuringia etechnik uniulm de html Meyers KonversationsLexikon Eine Encyklopdie des allgemeinen Wissens gnzlich umgearbeitete Auflage Bd Bibliographisches Institut Leipzig author PDMeyers Burg Greifenstein Bad