Loudoun Mansion

Loudoun Mansion is a historic house located in the Germantown neighborhood of Philadelphia, Pennsylvania.

An example of Federal-style and Greek-revival architecture, the main structure was built by Thomas Armat in 1801 and expanded in 1810. The Greek portico was built in 1830. The house stands on one of the highest hills overlooking Philadelphia and the Delaware River from Germantown. During and after the Battle of Germantown many wounded soldiers were carried to the top of the hill where Loudoun now stands.

The house was donated to the City of Philadelphia in 1939. The house is a contributing property of the Colonial Germantown Historic District.