Built in 1789, Strawberry Mansion (the actual mansion, not the neighborhood that draw it's name from the mansion) has a place in the foundations of Conscientious Objection as well as abolition.
The mansion was built for William Lewis, a lawyer in the revolutionary era who eventually was appointed to Federal judicial posts by George Washington and advised Alexander Hamilton on the founding of the First Bank of the United States. As a lawyer, he made a name for himself defending Quakers against charges of treason when they refused to fight in battle or pay taxes which would support war.
He later was instrumental in the drafting and passage of legislation in 1780 which was the first legal action towards abolishing slavery in the United States.
The mansion, in East Fairmount Park, is open for public tours. Visit historicstrawberrymansion.org for hours and special events.