Philosophical Hall

American Philosophical Society Hall
U.S. National Register of Historic Places
U.S. National Historic Landmark
American Philosophical Society
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Location	104 S. Fifth St. Philadelphia, Pennsylvania
Coordinates	39°56′55″N 75°8′58″W / 39.94861°N 75.14944°W / 39.94861; -75.14944
Built	1787
Architect	Samuel Vaughan
Architectural style	Georgian
NRHP reference No.	66000675[1]
Significant dates
Added to NRHP	October 15, 1966
Designated NHL	January 12, 1965

Philosophical Hall is a historic building at 104 S. 5th Street in Center City, Philadelphia, Pennsylvania, USA. Located near Independence Hall, the building has, for over 200 years, been the headquarters of the American Philosophical Society. It was designated a National Historic Landmark in 1965 for its association with that organization.