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Sophocles: The Man and His Plays
In addition to the usual biographical material and links to English translations of his plays, this includes a long discussion of "Oedipus the King," Sophocles' most famous work.
TheatreHistory.com
Theatre history.com: Sophocles and His Tragedies
This site provides a complete biography of Sophocles reprinted from a drama history book. Includes his innovations in ancient theater and his achievements as an artist.
Steven Kreis, PhD
The History Guide: Sophocles
A discussion of the writings of Sophocles, in particular Antigone, and the theme of the conflict between personal and political matters.
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Ancient Greek Theatre: Sophocles
A personal site on Greek theatre with a brief biography of Sophocles, along with a short list of his works and summaries of each.
University of Oxford (UK)
Beazley Archive: Oedipus
Illustrated dictionary entry for Sophocles' play Oedipus. Highlights and describes some events in the famous play.