Bruno, Saint, c.1030-1101, German monk, founder of the Carthusians: Brief biographical entry in the Columbia Encyclopedia.
Catholic Encyclopedia: St. Henry II: Biography of the German king and Holy Roman Emperor, d. 1024.
Early Lutheran Hymn Writers: Biographical sketches of Philipp Nicolai, Johann Heermann, Paul (Paulus) Gerhardt, and Calvinist near-contemporary Joachim Neander.
Henry II, Holy Roman emperor and German king: Biographical article in the Columbia Encyclopedia, 6th ed.
Open Door Mission Church: Bible literature, e-zine, links, beliefs and general information.
Schaff's History of the Christian Church Vol VII: The complete text of Schaff's book about the German Reformation.