The Glass City
Toledo, a city in the U.S. state of Ohio, is widely known as the "Glass City" and has earned the nickname "Glass Capital of the World." The name comes from the city long and remarkable history as a center of glass manufacturing, a reputation it built up over more than a century.
Why Toledo?
Toledo became a glassmaking hub for practical reasons rooted in its geography. The area had the natural resources that glass production needs, and the discovery of natural gas in the region in the late nineteenth century gave glassmakers a cheap, clean fuel for the intense heat their furnaces required. Good transport links by canal and railroad meant finished glass could be shipped far and wide. Glass companies relocated to Toledo to take advantage of all this, and the industry took root.
More Than Just Bottles
Over the years, Toledo factories produced an astonishing range of glass - bottles, tableware, window glass, automobile glass, and more. The city was also important to glass as an art form. Toledo is home to a major art museum with a building dedicated entirely to glass, where visitors can watch glass being shaped and learn its history. The "Glass City" nickname celebrates both sides of that story, the industrial and the artistic.
Source
This article was written using information from Wikipedia.