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5800 BCE
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First signs of occupation at the site later known as Aphrodisias.
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c. 5000 BCE
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Almendres Cromlech erected in Portugal
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3000 BCE
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Construction of Stonehenge I
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c. 2600 BCE-c. 2400 BCE
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Ring of Brodgar erected in Orkney Islands; the date is uncertain because it has not been excavated
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2500 BCE
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Stonehenge I abandoned
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2100 BCE
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Construction of Stonehenge II
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2000 BCE
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Construction of Stonehenge III
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1900 BCE
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About 20 bluestones from Stonehenge II are erected in a horseshoe shape inside the sarsen horseshoe in the center of Stonehenge III.
