Conventionsthaler

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Conventionthalers of Franz I of Austria, 1822 & Friedrich August of Saxony, 1813

The Conventionsthaler (Conventionstaler, Konventionstaler) was a standard silver coin of the Holy Roman Empire. It was introduced in 1754 and contained one tenth of a Cologne mark of silver or 23.3856 grams. Its most famous example is the Maria Theresa thaler which is still minted today.

The Austrian Empire introduced the Conventions currency standard in 1754 to replace the Leipzig standard of 1690, after a drop in the gold-silver price ratio from 15 to 14.5 in the 1730s unleashed a flood of cheaper thalers defined in gold. The Leipzig standard defined the North German thaler currency unit at 3/4 the Reichsthaler specie of 25.984 g, or 19.488 g fine silver. In contrast, in 1741 the gold Friedrich d'or pistole of 6.05 g fine gold was issued for 5 thalers. This resulted in a cheaper Thaler Gold worth 1.21 g fine gold or 1.21 x 14.5 = 17.545 g fine silver.

The Conventionsthaler succeeded the Reichsthaler specie (containing 25.984 g fine silver) as the standard coin in most of the Holy Roman Empire, with a variety of subdivisions being used:

  • 1 Conventionsthaler = 2 Austro-Hungarian gulden, each gulden equal to 20 groschen or 60 kreuzer.
  • 1 Conventionsthaler = 2.4 South German gulden, each also containing 60 kreuzer.
  • 1 Conventionsthaler = 113 North German thaler currency unit, each of 24 groschen.

During the early 19th century, the Conventionsthaler of 113 thaler (17.5392 g fine silver per thaler) was superseded in Northern Germany by the Prussian thaler containing 1/14th a Cologne mark or 16.70 g fine silver, while the Conventionsthaler of 2.4 South German gulden (9.73 g fine silver per gulden) was superseded by the 2.7-gulden Kronenthaler containing 9.524 g fine silver per gulden.

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