Mark (weight)
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The mark was originally a unit of weight for gold and silver common throughout western Europe, and was equal to 8 troy ounces (249 g). Variations throughout the Middle Ages were, however, considerable.
Like the pound 12 troy ounces (373 g), the mark was also used as a unit of currency, e.g. in many Shakespearean plays set in medieval England, and in various incarnations in Germany until the adoption of the euro in 1999.