Here is a small list of building we know where design by Gronenberg _and_ Leuchtag in New York City. List may be incomplete.
More buildings built by Gronenberg & Leuchtag on Histograd
Park Central Hotel
Congregation Beth Israel West Side Jewish Center
336 West 37th Street
Times Square Hotel
118 Riverside Drive
On list
On map
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New York Map
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New York Architecture
Any Manhattan adress on a 1885 map
