From the review:
The first glass makers in Germany were brought there by the Romans, but after they left, it wasn’t until the Middle Ages that Germans rediscovered the art of making glass. By the end of the 17th century, there were about 60 glass factories and the area in the eastern part of Bavaria (in southern Germany) gradually developed into an important center for glass making. Today, in the Bavarian Forest near the border with the Czech Republic, the Glass Road is a 150-mile long path that takes you to many sites where you can see both antique and new glass, as well as picturesque towns and villages with lovely landscapes. There are factories that use the most modern production techniques, as well as small artisan shops that rely on traditional glass making methods. There are also glass museums, where you can see interesting works from the past, and in glass galleries the latest glass innovations can be viewed.