Philipp Jakob Spener 
 Briefe aus der Dresdner Zeit 1686-1691
 Band 4: 1690-1691 
  Edited by Udo Sträter and Johannes Wallmann, in collaboration with Klaus vom Orde 
 
[Letters from the Dresden Period 1686-1691. Volume 4: 1690/91.]
 2017. XLIV, 821 pages.    Summary 
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 Philipp Jakob Spener was the founder of the pietistic movement, and his letters provide a very important source for the research of the early Modern Age, not only in the field of church history, but also in that of social history and the history of ideas. Volume IV of the »Dresdner Briefe« consists of 170 letters.