Here is a small list of building we know where design by Sommerfeld _and_ Steckler in New York City. List may be incomplete.
More buildings built by Sommerfeld & Steckler on Histograd
On list
On map
Street view
New York Map
8 items in this list for New York City, viewed 8848 times
New York Architecture
Any Manhattan adress on a 1885 map
