A historical Italian or Spanish gold coin worth twice as much as a single unit, often used in the Renaissance.
From Italian 'doppia' meaning 'double', from Latin 'dupla'. It was called 'double' because it was worth two of the basic gold coins.
The word 'doppia' is the Italian ancestor of words like 'double'—and actual doppia coins were treasured across Europe during the Age of Exploration because they were reliable value.
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