Manhattan has been the scene of many important American cultural movements . In 1912 , about 20,000 workers , a quarter of them women , marched upon Washington Square Park to commemorate the Triangle Shirtwaist Factory fire , which killed 146 workers on March 25 , 1911 . Many of the women wore fitted tucked-front blouses like those manufactured by the Triangle Shirtwaist Company , a clothing style that became the working woman 's uniform and a symbol of women 's liberation , reflecting the alliance of labor and suffrage movements
Triangle Shirtwaist Factory fire
Triangle Shirtwaist Factory fire
Manhattan