Plato (~428-~348 BC) - One of the greatest and most influential Greek
philosophers, he was a disciple of Socrates and the teacher of Aristotle.
Most of his works are written dialogues, many with Socrates as the main
character. Plato founded a school of philosophy known as the Academy.
Crito (380 BC) - An account of a conversation between Socrates and Crito,
a supporter of Socrates' teaching. This dialogue takes place at Socrates'
prison cell two days before his execution.