Ancient Greek literature
Seven works of Sophocles have survived, the most acclaimed of which are the three Theban plays, which center around the story of Oedipus and his offspring. The Theban Trilogy consists of "Oedipus the King", "Oedipus at Colonus", and "Antigone". Although the plays are often called a "trilogy," they were actually written many years apart. "Antigone", the last of the three plays sequentially, was actually first to be written, having been composed in 441 BC, towards the beginning of Sophocles's career. "Oedipus the King", the most famous of the three, was written around 429 BC at the midpoint of Sophocles's career. "Oedipus at Colonus", the second of the three plays chronologically, was actually Sophocles's last play and was performed in 401 BC, after Sophocles's death.
Socrates
The sources are thought to have in part or wholly made use of the factual information of the life of Socrates available to each of them, to give their own interpretation of the nature of his teaching, giving rise to differing versions in each case. For example, in Aristophanes's play "The Clouds", Socrates is made into a clown of sorts, particularly inclined toward "sophistry", who teaches his students how to bamboozle their way out of debt. However, since most of Aristophanes's works function as parodies, it is presumed that his characterization in this play was also not literal. In "Phaedo", which is the only attested source describing the death of Socrates, Plato is thought to have selected and omitted details to provide material for his argument for the existence of the liberation of the soul from the body, an argument he possessed from learning of the ideas of Pythagoras (born sometime after 606 and died sometime after 510 BC).