Concept
Version 14
Created by Boundless
The White City, Chicago, and the World Columbian Exposition
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Weltausstellung-chicago brockhaus."
http://en.wikipedia.org/wiki/File:Weltausstellung-chicago_brockhaus.jpg
Wikipedia
Public domain.