<P> An image of the Liberty Bell appears on the current $100 note . The image shifts in color, depending on the angle at which it is held . </P> <P> The name "Liberty Bell" or "Liberty Belle" is commonly used for commercial purposes, and has denoted brands and business names ranging from a life insurance company to a Montana escort service . A large outline of the bell hangs over the right - field bleachers at Citizens Bank Park, home of the Philadelphia Phillies baseball team, and is illuminated whenever one of their players hits a home run . This bell outline replaced one at the Phillies' former home, Veterans Stadium . On April 1, 1996, Taco Bell announced via ads and press releases that it had purchased the Liberty Bell and changed its name to the Taco Liberty Bell . The bell, the ads related, would henceforth spend half the year at Taco Bell corporate headquarters in Irvine, California . Outraged calls flooded Independence National Historical Park, and Park Service officials hastily called a press conference to deny that the bell had been sold . After several hours, Taco Bell admitted that it was an April Fools' Day joke . Despite the protests, company sales of tacos, enchiladas, and burritos rose by more than a half million dollars that week . </P>

When was the last time they rang the liberty bell