On Mar. 25, 1911, a fire at the Triangle Shirtwaist Co. in New York City resulted in the deaths of 146 women workers who were unable to get out of the building because of locked exit doors and inadequate fire escapes. The disaster led to the creation of the New York State Factory Investigating Commission and an overhaul of legislation relating to the state's factories.

Damaged fire escape at the Triangle Shirtwaist Company building (Library of Congress)

To learn more about this episode, visit The Triangle Factory Fire, a website hosted by Cornell University that includes documents, photographs, and other primary sources.