Valley Forge National Historical Park is the site of the third winter encampment of the Continental Army during the American Revolutionary War, taking place from December 19, 1777 to June 19, 1778. The National Historical Park preserves the site and interprets the history of the Valley Forge encampment. Originally Valley Forge State Park, it became a national historical park in 1976. The Park contains historical buildings, recreated encampment structures, memorials, museums, and recreation facilities.