In 1893, the 27.5 million visitors to the Chicago World's Fair feasted their eyes on the impressive architecture of the White City, lit at night by thousands of electric lights. In addition to marveling at the revolutionary exhibits, most visitors discovered something else: beyond the fair's 633 acres lay a modern metropolis that rivaled the world's greatest cities. The Columbian Exposition marked Chicago's arrival on the world stage, but even without the splendor of the fair, 1893 would still have been Chicago's greatest year. An almost endless list of achievements took plac.