He mailed us: "I have had an interest in the work of Gunther Behnisch and now Stefan Behnisch, going back fifteen years to my university training as an architect. One of my Professors led a study tour to Germany in 1997. I have had the good fortune to visit a few buildings then and since, but my curiosity led to identifying them in Google Earth."
There are about 45 projects listed in this file. A great resource for those of you who have the same interest as Lohren, or want to organise a study trip to visit them all. Download the KMZ file.