The History of the Peloponnesian Wars, written by the Athenian historian Thucydides, is an out- standing example of inquiry, writing and historic narration. To accomplish the last two of these operations, prior research or investigation into certain specific and particular facts is required, which can be done only by recalling and rescuing them from obscurity. However, this does not involve ordinary facts or events of little or no significance, but those with characteristics that stem from two fundamental features: importance and reli- ability. These features play a prime role in Antiquity with respect to inquiry into the human past and present. This inquiry is carried out by three similar and related, but not identical disciplines: history, archeology and chronology.