
The flatiron building became one of the symbols of New York. At that time, with its 20 floors, it was the tallest building in the city. It contains 23,690.3 m2.
The unusual triangular shape of the building was due to the the location conditions: the triangle-shaped terrain was located at the intersection of the 5th Avenue, Broadway and East 22nd Street.
Architects: Daniel Burnham and Frederick Dinkelberg.
It’s a long time since I have seen it in real life but I seem to remember it was very striking at the narrow end and rather normal at the whiter end.
Here is an amazing article on the Flatiron Building, which also has full descriptions and the source of the photos below

