Harriton House, originally known as Bryn Mawr, is an historic house which is located in Montgomery County, Pennsylvania, and was most famously the residence of Founding Father Charles Thomson.  He originally acquired the house and estate through his marriage to Richard Harrison’s daughter, Hannah Harrison, in 1774.

In 1789, after serving 15 years as the Secretary of the Continental and Confederation Congresses, Charles and his wife Hannah retired to Harriton, where he remained until his death in 1824.  In his retirement, Charles pursued an interest in scientific agriculture, which was America’s principal industry immediately following the Revolution.  He was a member of the Philadelphia Society for Promoting Agriculture.  Harriton House was added to the National Register of Historic Places in 1973.

Location

Harriton House
500 Harriton Road
Bryn Mawr, PA  19010

Logistics

• Thursday, May 7, 2026 with meet and greet at front entrance at 10:00 am; program at 10:30 am.; and lunch together at noon.  Lunch will be served in a location adjacent to the farm.
• Registration fee is $35 and pre-registration is required.  Register by contacting pspaonline@gmail.com with the name(s) of the people attending, their affiliations, and emails.
• Make checks out to Philadelphia Society for Promoting Agriculture and mail to PSPA Treasurer, 140 Waypoint Dr., Lancaster PA 17603.
• Click here and follow the link to purchase your ticket for luncheon meetings with PayPal or Credit Card.
• Parking is available onsite.
• Contact Scott Sheely at pspaonline@gmail.com with any questions.
• Registration ends at noon on Friday, May 1, 2026.