The Liberty Bell, which is located in Philadelphia, Pennsylvania, is an American bell of great historic significance. The Liberty Bell is perhaps one of the most prominent symbols associated with the American Revolution and the American Revolutionary War. It is one of the most familiar symbols of independence, nationhood and freedom within the United States, and has been used as an international icon of liberty.
The most famous ringing, took place on July 8, 1776, which called the citizens of Philadelphia for the reading of the Declaration of Independence. Previously, it had been rung to announce the opening of the First Continental Congress in 1774 and after the Battle of Lexington and Concord in 1775.
The Liberty Bell was known as the "Old State House bell" until 1837, when it was adopted by the American Anti-Slavery Society as a symbol of the abolitionist movement.
http://www.ushistory.org/libertybell/
