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Books about Borkenstein:
What do the names Borkenstein, Brandon, Dick, Harger, Julian, Lilly, Muhler, Scholl, and Walker have in common... by Unavailable (Jul 24, 2009)
Wiki information Borkenstein:
Susette Gontard, née Borkenstein, dubbed Diotima by the German poet Friedrich Hölderlin after Diotima of Mantinea, was the inspiration for his novel Hyperion, published in 1797–1799. She was the wife of Hölderlin's employer, the Frankfurt banker...