From 1810 until 1933 all of the presidents of Harvard University were UnitariansÑa span of 123 years. Who were these leaders of higher education in the United States of America? The following online illustrated stories seek to answer that question. For delightfully longer biographies, see the classic Three Centuries of Harvard 1636-1936 by Samuel Eliot Morison, and Harvard Observed by John T. Bethell.