Search Only Images Download this image Portrait of Johann Praetorius No info available for book source. Image ID: SIL-SIL14-p006-01 Supplied Caption: Portrait of Johann Praetorius. Engraving by Wolfgang Philip Kilian, 1654-1732. After Wolfganag Philip Kilian, 1654-1732. Tags: mathematics, Praetorius, Johann (1537-1616) Categories: Science Collection(s): Scientific Identity No Copyright - United States Request copy of image How can I use this image?