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Vienna Beef Hot Dogs
Austrian-Hungarian immigrants Emil Reichl and Sam Ladany sold their snappy, all-beef hot dogs from a street cart at the 1893 World's Fair, and served millions of customers. They were able to enlarge the business with their profits, and officially named it Vienna Beef. The beefy tubesteaks weren't served in the now-iconic Chicago style (on a poppy seed bun with onions, neon green sweet relish, dill pickle spears, tomatoes, sport peppers, yellow mustard, celery salt, and absolutely no ketchup ever) until around the Great Depression, but the Vienna Beef dog has been beloved in the city for well over a century.