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The Poetics of Aristotle: The Rise of Comedy
This selection from Aristotle's "Poetics" offers the famous Greek philosopher's explanation of the origins of comedy. For a complete understanding of both comedy and tragedy in the traditional literary sense, the entire text of...
TheatreHistory.com
Theatre history.com: Greek and Roman Comedy
This TheatreHistory.com page talks about Greek and Roman tragedies. Includes links from within the text.