In the early seventeenth century, there was already a vigorous international trade in glassware. The world center for glassmaking was in Venice, and the Venetians were most famous for tableware and glass mirrors made of the colorless cristallo. Germany and Bohemia were known for large, decorated drinking glasses, especially those of the green shade which came to be known as waldglas. The French craftsmen of Lorraine and Normandy made both clear and stained glass for windows, some of which was exported.
What, then, do the up-timers of Grantville have to offer experienced Renaissance glass workers . . .