Dey Mansion

Washington's Headquarters

The Dey Mansion, constructed around 1770 by Theunis and Hester Dey, is a prime example of Georgian architecture and played a pivotal role during the American Revolution as General George Washington's headquarters in 1780. The Dey family, with colonial roots dating back to 1641, was prominent in public affairs; Theunis served in the State Council and was a trustee of Queen’s College (now Rutgers University). Washington first arrived at the mansion in July 1780, overseeing military operations such as the attack on Bull’s Ferry, before departing to coordinate with French allies. He returned in October amid the upheaval following Benedict Arnold’s treason, utilizing the mansion's strategic location in the Preakness Valley to safeguard his forces. ​

During Washington’s stay, military efforts included a planned attack on Staten Island and reconnaissance near Fort Lee, though some operations were ultimately called off. On November 27, 1780, he departed for Morristown, leaving behind a legacy that remains preserved within the mansion’s walls. As one of Washington’s surviving field headquarters, the Dey Mansion offers visitors a glimpse into the challenges and triumphs of the Revolutionary War.