Sophocles, who was born in Colonus Hippius (now part of Athens), is thought by many modern scholars to be the greatest of the Greek tragedians. Around 430 BC, Sophocles wrote Oedipus Tyrannus, also known as Oedipus Rex. Oedipus Rex set the standard for Greek tragedy, and is regarded today as a work of genius. The philosopher Aristotle even went as far to consider it the most perfect of all the Greek tragedies. There are several reasons that this work is held in such high regard. One such reason is that it creates a healthy sense of confusion of pleasure and disquietude in the reader. Oedipus Rex takes place