Discusses four glass pieces (two tumblers and two table decorations) cut and engraved by Johann Lenk at the Zich factory, Joachimsthal, 1814-1825, for the former Holy Roman Emperor Francis II and his son, Crown Prince Ferdinand. The pieces were included in the emperor's collection of selected examples of outstanding glasswork, now in the Technisches Museum für Industrie und Gewerbe, Vienna.
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