University of St. Andrews (UK)
University of St. Andrews: A History of the Calculus
A site detailing the history of calculus. Many links to informative pages on historical figures. Also links to birthplace maps.
Trinity College Dublin
History of Mathematics: Bonaventura Cavalieri (1598 1647)
A biography of Cavalieri that includes information on his principle or "indivisibles." From a 1904 text by W. W. Rouse Ball.
Famous Scientists
Famous Scientists: Gottfried Leibniz
Learn about the life and work of Gottfried Leibniz, and find out how he remains one of the greatest and most influential metaphysicians, thinkers, and logicians in history.