Concurrent with this change was the development of national and international commercial enterprises to meet the new demand for cameras, films and prints. At the 1893 World Columbian Exposition in Chicago, which attracted more than 27 million people, photography for amateurs was marketed at an unprecedented scale. There were multiple large exhibits displaying photographs from around the world, many camera and darkroom equipment manufacturers showing and selling their latest goods, dozens of portrait studios and even on-the-spot documentation of the Exposition itself. Suddenly photography and photographers were household commodities.