New York City was first settled by Europeans in 1624 by the Dutch. Often called the Big Apple, New York City is the center point of many of the world’s industries. A key industry in New York City outside of commerce is real estate. Outside of business and tourism, New York City has virtually no manufacturing or agriculture economy. New York City is one of the most densely populated places in the world, with 8.5 million people packed into 468.9 square miles. New York City is a crucial part of the world’s government because it is the headquarters of the United Nations.