In his ›Vita‹, Andreae draws a vivid picture of the academic and political world in contemporary German Protestantism. The personal testimonial served to prove his own orthodoxy and emphasized the special contribution the Andreae family made to the Reformation and to Protestant orthodoxy. Descriptions of a journey to Austria, two fires and the pillage of Calw are added along with the ›Vita‹ and, against the backdrop of the Thirty Years’ War, provide eyewitness accounts of one of the most dramatic eras of German history. The commentary contains prosographic and historical information and paints a vivid picture of the powerful network of friends, colleagues and people with whom he corresponded. It also provides a list of persons and institutions who were part of the evangelical reforms in the 17th century.