The Liberty Bell, previously called the State House Bell or Old State House Bell, is an iconic symbol of American independence, located in Philadelphia, Pennsylvania. Once placed in the steeple of the Pennsylvania State House (now renamed Independence Hall), the bell today is located across the street in the Liberty Bell Center in Independence National Historical Park. 

The bell first cracked when rung after its arrival in Philadelphia, and was twice recast by local workmen John Pass and John Stow, whose last names appear on the bell. In its early years, the bell was used to summon lawmakers to legislative sessions and to alert citizens about public meetings and proclamations.

Professor Constance M. Greiff, in her book tracing the history of Independence National Historical Park, wrote of the Liberty Bell: The Liberty Bell is the most venerated object in the park, a national icon. It is not as beautiful as some other things that were in Independence Hall in those momentous days two hundred years ago, and it is irreparably damaged. Perhaps that is part of its almost mystical appeal. Like our democracy it is fragile and imperfect, but it has weathered threats, and it has endured.

- Wikipedia