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The grzywna (from Polish) was a measure of weight, mainly for silver, commonly used throughout medieval central and eastern Europe, particularly in the Kingdom of Poland and Kingdom of Bohemia (Czech: hřivna).
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Grzywna was also a unit of measure of a unit of exchange, and as such used as money in the 10th–15th centuries. Silver ingots acted as commodity money before the widespread use of minted coins. Several different grzywnas developed with their own system of weight and exchange, such as the Kulm grzywna and the Krakow grzywna.
Etymology
The name is derived from Proto-Slavic *grivĭna 'necklace' from Proto-Slavic *griva 'neck, nape, mane'.
Krakow grzywna
The Krakow grzywna, used in Poland, weighed anywhere from 196.26 g to 201.86 g, depending on the timeframe. In the 14th century, it was equal to 196.26 g, while in the beginning of the 16th century in weighed 197.684 g, but after 1558 it was equivalent to 201.802 g and after 1650 it was 201.86 g.
The Krakow grzywna was subdivided thus: 4 wiarduneks or quarters = 8 ounces = 16 drams = 24 skojecs = 96 grains = 240 denarii = 480 obols
As a measure of unit of exchange, the Krakow grzywna was equal to 48 Prague groschen. During the rule of Wladyslaw I the Elbow-high 576 denarii were struck from one Krakow grzywna of silver. During the rule of his son Casimir the Great, 768 denarii were struck from it and during the reign of Władysław II Jagiełło, it was 864 denarii.