When did most Greek states stop minting silver coinage?
Reference
OpenAI's Answer
Most Greek states ceased minting silver coinage by the reign of Augustus. Augustus ruled from 27 BC to AD 14, marking the end of large-scale silver minting activities in many Greek states during this period.
For more detailed information, you can refer to the Wikipedia page on ancient Greek monetary standards here.
Here is an image of a typical ancient Greek silver coin:
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