Potbelly Sandwich Shop, also known as Potbelly Sandwich Works, is a chain of publicly traded restaurants known for selling submarine sandwiches as well as other food. They have 413 restaurants located in the United Kingdom, United States, Canada and the United Arab Emirates. Potbelly Sandwich Shop has its headquarters in Chicago, Illinois. They were founded in the year 1977 by a man named Peter Hastings in Chicago. They offer a variety of different sandwiches that are served hot. There are different ways you can customize the bread that you eat with the sandwiches. They also offer soup, malts, shakes and cookies.