The gift, from the estate of its founding chairman, H.F. Lenfest, will nearly double the Philadelphia museum’s endowment.The gift, from the estate of its founding chairman, H.F. Lenfest, will nearly double the Philadelphia museum’s endowment.Read MoreMuseums, Revolutionary War, American (1775-83), Endowments, Museum of the American Revolution, Philadelphia (Pa), Lenfest, H F, Philanthropy