The Triangle Shirtwaist Factory fire in New York City on March 25, 1911, was the largest inustrial disaster in the history of the city of New York, causing the death of 148 garment workers who either died from the fire or jumped to their deaths. It was the worst workplace disaster in New York City until September 11, 2001. The fire led to legislation requiring improved factory safety standards and helped spur the growth of the International Ladies' Garment Workers' Union, which fought for better working conditions for sweatshop workers in that industry. The Triangle Shirtwaist Factory Building, also known as the Asch Building and as the Brown Building, survives and was named a National Historic Landmark.