The American Revolution Center’s rich collection of objects, art, manuscripts, and printed works has been assembled over the past century, beginning with the 1909 purchase of General George Washington’s sleeping tent (or marquee) from Mary Custis Lee, Martha Washington’s great, great granddaughter. The collection was housed and portions of it were displayed in the Washington Memorial Chapel at Valley Forge, Pennsylvania, for many years. The collection continues to grow and broaden in scope, now containing materials that illustrate the struggle for American Independence and commemorate the American Revolution. Selected pieces have been displayed in recent years at George Washington’s Mount Vernon, the David Library of the American Revolution, the Pennsylvania Academy of the Fine Arts, the National Constitution Center, Valley Forge National Historical Park, and other historic sites.