In lampworking, Glass rods or tubes are held in a flame (of a Bunsen burner). Only the Glass in the flame gets hot and so can be shaped more accurately and with more control to form more intricate patterns than is possible with Glassblowing at a furnace. The technique is primarily used to make laboratory instruments. The Thuringian-born lampworker C.H.F. Müller, who lived in Hamburg from 1865, also focused on making technical instruments, and from 1895/96 especially X-ray tubes. Moreover, he produced lampworked Glass artworks based on Venetian models into the 1880s. Although he used a very different technique, for a long time it was thought his products were made in the 16th and 17th centuries and in the 19th century were probably sold as such in bad faith. There is no direct model for the Düsseldorf decorated cup in older Glasswork. Today, the cup’s lid is located at the Grand Curtius Museum in Liège, Belgium. (Dedo von Kerssenbrock-Krosigk)