The story of Little Italy’s Feast of San Gennaro is the story of how Italian immigrants became American

Over the past century, New York City's Feast of San Gennaro has grown from a one-day, parochial affair into an 11-day event that draws more than a million visitors. Spencer Platt/Getty Images

For two weeks in September, everyone wants to be Italian – at least judging by the crowds at the annual Feast of San Gennaro in New York City’s Little Italy.

Founded in 1926, the largest and longest-running Italian festival in the United States celebrates its 100th anniversary this year, with locals and tourists alike descending upon Mulberry Street in Manhattan to celebrate Italian American culture.