For forty years Moss directed the Athenaeum of Philadelphia and for 25 of those years he also taught in the Graduate Program in Historic Preservation at the University of Pennsylvania .
The Athenaeum of Philadelphia is a special collections library near Independence Hall .
For forty years Moss directed the Athenaeum of Philadelphia , a special collections library near Independence Hall , and for 25 of those years he also taught in the Graduate Program in Historic Preservation at the University of Pennsylvania .