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  • Avebury

    4001 BC – 3501 BC

  • Stonehenge

    3101 BC – 2401 BC

  • Old Babylon

    1801 BC – 1601 BC

  • Persian Empire

    431 BC – 425 BC

  • Hellenistic Observations

    167 BC – 165 BC

  • Zodiak of Dendera

    51 BC – 51 BC