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Foundation of the Hellenic World: Greek History: The History of Greece
Covers the different periods of Greece's history from 3200 BC, with the Cycladic Civilization, up to the latter half of the twentieth century.
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Foundation of the Hellenic World: Hellenic History
A site devoted to presenting the history of Greece all the way back to the Stone Age. Choose which period you want to know more about, then choose English for a translation.