Flatiron

And it has to be in B&W or grayish, at least that's what most of the reproductions show.
We explored the neighbourhoods of midtown today and this was in the early part of the "expedition". By chance the end of the trail was Zaha Hadid building on the west side by the High Line - interesting span of the architectural approaches over a century of New York history. I'll put ZH building in the extra. And the coloured variation of the Flatiron.