Victory Arch in NYC

This is a wonderful view of the Victory Arch that was temporarily put up in New York City to celebrate the victory of WWI.

I ran across this photo while going through boxes of old family photos and I've been wondering about the location. I'm fascinated by the building and want to know more about it. I've typed in searches for Onyx and the only thing that comes up is the Onyx Hotel in Boston. Any ideas as to where this could be?