On July 8, 1776, with the Liberty Bell ringing out from the tower of Independence Hall summoning the citizens of Philadelphia to hear the first public reading of the Declaration of Independence by Colonel John Nixon the world changed.

The inscription on the bell reads: "Proclaim LIBERTY Throughout all the Land unto all the Inhabitants Thereof Lev. XXV.v X. By Order of the ASSEMBLY of the Province of PENSYLVANIA for the State House in Philada. Pass and Stow. Philada. MDCCLIII".

At the time, "Pensylvania" was accepted alternative spelling for "Pennsylvania." That spelling was used by Alexander Hamilton in 1787 on the signature page of the United States Constitution.

The Liberty Bell's inscription is from Leviticus 25:10: "Proclaim Liberty Throughout All the Land Unto All the Inhabitants thereof." Speaker of the Pennsylvania Assembly Isaac Norris chose this inscription for the State House bell in 1751, possibly to commemorate the 50th anniversary of William Penn's 1701 Charter of Privileges which granted religious liberties and political self-government to the people of Pennsylvania.

It is uncertain how the bell came to be cracked; the damage occurred sometime between 1817 and 1846. The last time it rang on February 23, 1846, for George Washington's birthday. On January 1, 1976, the Liberty Bell was moved to its new home at the Liberty Bell Pavilion on Market Street near Independence Hall.

More Info: en.wikipedia.org