Cooper Union's Great Hall November 1909

A mass meeting, attended by labor leaders including Samuel Gompers, was held in November 1909 in Cooper Union's Great Hall. It was there that 23-year-old shirtwaist maker Clara Lemlich called for a strike that led to the Uprising of the 20,000.

Courtesy of the International Ladies' Garment Workers' Union Archives, Kheel Center, Cornell University.