About Fort Mifflin on the Delaware
On active duty through the Revolutionary War, War of 1812, Civil War, World War I and World War II, Fort Mifflin on the Delaware continues to soldier on as a National Historic Landmark and the only fort in Philadelphia. The history of this fascinating (and reportedly haunted) outpost stretches back to 1771 when it was first laid out by the roguish engineer John Montresor. Later, during the Revolution, a scrappy American force valiantly held the fort under relentless British siege. Rebuilt according to plans drafted by Pierre Charles L’Enfant (the genius who planned D.C.), Fort Mifflin continued to serve as an important military installation for another 150 years. Now visitors can explore the evocative grounds complete with battlements and cannons.