Built in 1766, this National Historic Landmark was the home of Silas Deane (1737–1789), the first foreign diplomat for the United States.

The interior features original woodwork, including pilasters and fully paneled fireplaces, and an elaborate stairway balustrade.

Deane successfully negotiated the secret agreement by which France supported the nascent United States prior to its formal entry into the American Revolutionary War in 1778, after signing a formal treaty of alliance negotiated by a commission that included Deane.

[3] In 1959, Deane's house was donated to The National Society of the Colonial Dames of America in Connecticut and in 1963–1965, it was restored.

It is now open as part of the Webb-Deane-Stevens Museum and includes original furniture and portraits of Deane and his second wife.