Concept
Version 15
Created by Boundless
Tenements and Overcrowding
New York's Flatiron Building
The iconic Flatiron Building, New York, shortly after its construction in 1903.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Detroit_Photographic_Company_(0645).jpg."
https://en.wikipedia.org/wiki/Early_skyscrapers
Wikipedia
CC BY-SA 3.0.