489 Fifth Avenue - Privately Owned Public Space (APOPS)
File:Otto and Addie Kahn Mansion plaque, 91st Street and 5th Avenue, UES, Manhattan, New York.jpg - Wikimedia Commons
1 East 91st Street, The Otto Kahn Mansion - Landmark Branding LLC
Daytonian in Manhattan: Buchman & Kahn's 1929 Art Deco 261 Fifth Avenue
BENEFIT FOR N.Y.U. CLINIC.; Mrs. Otto H. Kahn Opens Her Fifth Avenue House for Event. - The New York Times
The Grandest Block in New York - The New York Times
Otto Kahn Mansion. Upper East Side, NYC, Now home to the Convent of the Sacred Heart.
Albert Kahn Building — Historic Detroit
Albert Kahn Building - Wikipedia
261 5th Ave, c. 1928 by Ely Jacques Kahn, Art Deco modernist style. #lobbyshots #mosaics #archilovers #archihunter #artdeco #stripped…
Ely jacques kahn hi-res stock photography and images - Alamy
Daytonian in Manhattan: Buchman & Kahn's 1929 Art Deco 261 Fifth Avenue
Big Old Houses: The King of New York
53 Otto Kahn Stock Photos, High-Res Pictures, and Images - Getty Images