Mick Hartley

It could be Belle Époque Paris, but in fact it's New York, circa 1900:

 
[Photo: Shorpy/Detroit Publishing Co]

Full size here.

This is one of a number of wonderful early New York photos just posted at Shorpy: the Flatiron Bulding under construction, 1902; a characteristic sidewalk news stand, 1903, and the extraordinary dreamscape of Williamsburg Bridge Plaza, Brooklyn, 1904.