The Protagoras is a dialogue of Plato, put into the mouth of Socrates, like other his discussions. In this work, Socrates describes a conversation that had taken place between himself and the great Sophist at the house of Callias. Other people are participating in the dialogue. They start a discussion on the values of the teachings of Protagoras and go to his house to ask him questions. The further conversation continues between Socrates and Protagoras.