Thucydides, along with Herodotus, is considered one of the founders of historical science. In 424, he took part in the Peloponnesian War between the Greeks and the Spartans, and his work “History” provides the most significant testimony of those events. Thucydides proved himself as an outstanding storyteller: his work stands out for objectivity, careful observation, attention to details, and deep political analysis of the events described. “History” by Thucydides is not only fascinating to read, but also an important historical document that helps us better understand the ancient world.