The paper discusses the Triangle Shirtwaist Factory fire of 1911, a tragic event that claimed 146 lives, predominantly immigrant women, due to locked doors and inadequate safety measures. It highlights how the owners, Max Blanck and Isaac Harris, had previously ignored worker grievances and unionization efforts. The fire, exacerbated by the factory's conditions, sparked widespread public outrage and catalyzed the Progressive Era's labor reforms, despite the owners' subsequent acquittal and minimal restitution. This historical tragedy ultimately contributed to significant changes in women's rights and activism, leading to the building's recognition as a national landmark.