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File:Otto Kahn Mansion 010 stitched.jpg - Wikipedia
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1 East 91st Street, The Otto Kahn Mansion - Landmark Branding LLC
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Vanished New York City Art Deco - Stewart and Company / Bonwit Teller.
BENEFIT FOR N.Y.U. CLINIC.; Mrs. Otto H. Kahn Opens Her Fifth Avenue House for Event. - The New York Times