Free Museum Day at Fort Mifflin

Join us for FREEDOM BLAST!

Sunday, July 1st from 10 AM till 4 PM at Fort Mifflin

Journey through the Declaration of Independence at Fort Mifflin, a site that defended Philadelphia against the greatest bombardment of the American Revolution.  Participate in the flag raising ceremony, then stay to enjoy guided tours, blacksmithing and heritage craft demonstrations plus hands-on living history activities, uniform, weapon and cannon demonstrations.  Join the Army (circa 1777) and learn to drill with a wooden musket! Explore 18th century scientific discoveries with Founding Father Benjamin Franklin. Enjoy the view and the breeze in the riverfront picnic area. FREE parking. Rain or shine! Many activities are indoors or under cover.


Incorporated in 1986, Fort Mifflin on the Delaware (FMOD) manages operations, preservation and programming at National Historic Landmark Fort Mifflin. The organization was born from the Preservation Committee of the Olde Fort Mifflin Historical Society in order to more effectively raise funds for necessary restoration and program management.

The organization is governed by a Board of Directors and supported by paid staff who manage operations, programming and continued restoration. Significant restoration projects include the stabilization of the structure and restoration of the roof and cupola of the Commandant’s House, the centerpiece of Fort Mifflin and the excavation and preservation of Casemate 11, believed to be the Fort’s original Powder Magazine. Programming initiatives support the mission and vision of the organization, continuing a close association with the Olde Fort Mifflin Historical Society.

Fort Mifflin, originally called Fort Island Battery and also known as Mud Island Fort, was commissioned in 1771 and sits on Mud Island (or Deep Water Island) on the Delaware River below Philadelphia, Pennsylvania near Philadelphia International Airport.

During the American Revolutionary War, the British Army bombarded and captured the fort as part of their conquest of Philadelphia in autumn 1777. The United States Army began to rebuild the fort in 1794 and continued to garrison and build on the site through the 19th century. It housed prisoners during the American Civil War. The army decommissioned Fort Mifflin in 1962 and returned it to the City of Philadelphia. Historic preservationists have restored the fort.


Fort Mifflin

Fort Mifflin
1 Fort Mifflin Rd,
Philadelphia, PA 19153

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