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New York is a city of specialists from foodies to academics, laborers to shopkeepers. Every Wednesday, Niche Market takes a peek inside a different specialty store and showcases the city's purists who have made an art out of selling one commodity.

March 25 marks the 100th anniversary of the Triangle Shirtwaist Factory fire, New York's landmark industrial disaster that killed 146 of the factory's employees — most of them young immigrant women and girls of Italian and European Jewish descent. The tragedy sparked nationwide debate on workers' rights, representation and safety.