An Augustinian monk named Wenzel Seyler, a native of Bohemia, visited Vienna in 1675, and securing an interview with the reigning Emperor, Leopold I, son of Ferdinand III, accomplished in his presence a successful projection. He converted a copper vessel which had been brought to him into gold. He also changed tin into gold, and from the precious metal the Emperor caused ducats to be struck, stamped only on one side ; these bore on the obverse a portrait bust of the Emperor with the words: Leopoldus D.[ei] G.[ratia] R.[omanorum] I.[mperator] s.[emper] A. [ugustus] G.[ermanl�] H.[ungari/e] E. [t] B.[oheml/e] R.[ex] (Leopold, by the grace of God, the ever august Emperor of the Roman Empire, King of Germany, Hungary and Bohemia.) On the reverse the year 1675, and the couplet:

which may be paraphrased thus :

To read the book, see:Google Books: Contributions of Alchemy to Numismatics