Federal and Philadelphia officials met Thursday to discuss options for repairing the tower, which once housed the Liberty Bell. No decision was made.
Park officials say options range from minor repairs to complete rehabilitation. The tower sustained damage as the roof leaked, rusting iron bars that run through wood siding.
Work would begin in 2011 and Independence Hall would remain open.
The tower was built in 1828. It replaced the original tower, which dated from 1750.
Independence Hall is where the Declaration of Independence and Constitution were signed.
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