10 miners were killed when toxic gas from a locomotive filled Williamstown Tunnel on May 25, 1904
The leader of the United Mine Workers of America addressed the miners of the Coal Region on May 10, 1902.
"Anthracite rallies" encouraged miners to produce more coal to help the American war effort in 1942.
In 1906, Admiral Robley D. Evans declared anthracite coal a vital strategic resource and used the Civil War as an example.
Elizabeth Ellet documented a trip to the Coal Region in her book, "Rambles about the country."
Pennsylvania anthracite became the exclusive fuel source for the U.S. Navy during the Civil War.
A Harper's Weekly artist documented work in an anthracite mine in Pennsylvania in 1869.
As anthracite mines became increasingly electrified, mine mules began to disappear from the Coal Region.
A digital archive allows researchers to view hundreds of photographs taken in the Coal Region in the 19th century.
A recent visit to the site of Kalmia Colliery in Schuylkill County reveals life in an abandoned patch town.