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Rosaryville State Park is a public recreation area with historical features located three miles southeast of Joint Base Andrews(formerly Andrews Air Force Base) in Rosaryville, Prince George's County, Maryland. The state park includes the restored Mount Airy Mansion, which was formerly operated as an event facility, as well as hiking, biking and equestrian trails for day-use. The Mount Airy Mansion is managed by the Maryland Department of Natural Resources within the Rosaryville State Park.
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Expanded c. 1751 on the site of the 17th century hunting lodge of Charles Calvert, 3rd Baron Baltimore by his great-grandson Benedict Swingate Calvert.
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EST. 1751
In 1774, Benedict Calvert's daughter Eleanor Calvert (1758–1811), married John Parke Custis, son of Martha Washington and the stepson of George Washington, who attended their wedding celebrations at Mount Airy Mansion
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