Isaac Royall House, Colonial house museum in Medford, Massachusetts, United States.

The Isaac Royall House is a Georgian mansion from the 18th century in Medford, Massachusetts, listed as a National Historic Landmark. The three-story building has a symmetrical facade, detailed carved woodwork inside, and the grounds include a separate structure that once served as quarters for enslaved people.

The estate was developed in the 1730s by Isaac Royall Sr., who built much of his fortune through the slave trade in the Caribbean. When the American Revolution began, the Loyalist family fled to England, and the property was used briefly as a military headquarters.

The site is one of the few places in the United States where visitors can see both a wealthy colonial family's mansion and the surviving quarters where enslaved people lived side by side. This direct contrast makes the difference in living conditions between the two groups immediately visible.

The house is open for guided tours from June through October, covering both the main building and the slave quarters on the grounds. It is worth checking current hours before your visit, as the tour walks through several buildings and outdoor areas.

Isaac Royall Jr. left land to Harvard University in his will, and the proceeds helped fund the school's first law professorship. Harvard Law School used the Royall family coat of arms as its seal until 2016, when it was dropped because of the family's ties to the slave trade.