Concept
Version 13
Created by Boundless
The Railroad Strikes
Burning of the Pennsylvania Railroad and Union Depot
Burning of the Pennsylvania Railroad and Union Depot, Pittsburgh, Pennsylvania, July 21–22, 1877.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Harpers 8 11 1877 Steeple View of Pittsburgh Conflagaration."
http://en.wikipedia.org/wiki/File:Harpers_8_11_1877_Steeple_View_of_Pittsburgh_Conflagaration.jpg
Wikipedia
CC BY-SA.