Historian's tool

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Across
  1. 2. Common Era
  2. 3. Before Christ
  3. 6. any object made or used by people in the past
  4. 8. calendar mostly used world wide
  5. 9. Anno Domini-in the year of the lord
Down
  1. 1. something that tells us about history
  2. 2. keeper or custodian of the museum
  3. 4. study of the past
  4. 5. Before Common Era
  5. 7. written texts of the past