Sixteen years into its progress to a stature as mighty as its 300-year-old parent, the little oak grown from a Mercer Oak acorn still occupies the symbolic heart of the Princeton Battlefield. Named for General Hugh Mercer, who was fatally wounded by British soldiers during the Battle of Princeton, the magisterial Mercer Oak fell on March 3, 2000, after a wind storm toppled its last four branches. (Photo by Charles R. Plohn)