Johann Georg Holtzhey

Johann Georg Holtzhey (1729, Amsterdam – 1808, Amsterdam), was an 18th-century Dutch medallist and mint master.

According to the Netherlands Institute for Art History (RKD) he was the son of Martin Holtzhey, master of the mint in Gelderland and Middelburg. He took over his father's workshop in Amsterdam in 1749 when his father accepted his duties as "muntmeester" (mint master). He became mint master of the Utrecht mint, and became the teacher of the medallists David van der Kellen and Hendrik Lageman.

He made a name for himself designing and striking medals for Dutch honorary societies, and kept the presses for these societies, striking medals on request and engraving the names of the prize winners himself. On his death the presses were often purchased back at great expense by the societies. The Teylers Stichting (English: Teylers Foundation) had him design a prize medal in 1778 that is still used. At 1000 guilders the manufacture of the coin stamps was costly -a consequence of the size of the medals, which matched the ambitions of the new Foundation. Another receipt in the archive of Teylers Stichting testifies to the great care Holtzhey took when sending the medals, which were securely packed in wool to protect them from shaking. After Holtzhey's death the Foundation purchased the stamp press for the Teylers prize medal from the Holtzhey estate for 100 guilders.

In 1782 Holtzhey designed two medals for John Adams, one to celebrate the Dutch acknowledgement of the independence of the Thirteen colonies on April 19, 1782, and one to celebrate the trade treaty with the Netherlands on October 8, 1782. The face of the medal celebrating independence is in the collection of the Teylers Museum and declares “Libera Soror,” or “A Free Sister,” and depicts the Netherlands Maiden on the left as an armed woman and the United States on the right as a Native American woman. Holland uses a staff to place a Phrygian cap upon America's head, while America holds a shield bearing thirteen stars and rests a foot upon the head of a chained lion (representing England). The reverse shows the unicorn of the Royal coat of arms of the United Kingdom, prostrate with its horn broken against a rock cliff. The inscription reads, “Tyrannis virtute repulsa / sub Galliae auspiciis,” which translates to “Tyranny repelled by valor / under the auspices of France”,

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