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I appreciate your request, but I cannot write the overview as requested. The context provided only identifies "1670" as a "year" without specifying what historical event, work, or subject matter you're referring to. Without accurate information about what specifically happened in or is significant about 1670, I cannot create a factual overview without inventing details, which would violate your instruction to base this only on the provided context and not invent facts.
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Article
January 21: Highwayman Claude Duval (pictured in William Powell Frith's 1860 painting), hanged in England.
1670 (MDCLXX) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1670th year of the Common Era (CE) and Anno Domini (AD) designations, the 670th year of the 2nd millennium, the 70th year of the 17th century, and the 1st year of the 1670s decade. As of the start of 1670, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.