Unmarked works are assumed to have been written by Plato. [ 53 ] I. Euthyphro , (The) Apology (of Socrates) , Crito , Phaedo II. Cratylus , Theaetetus , Sophist , Statesman III. Parmenides , Philebus , (The) Symposium , Phaedrus IV. First Alcibiades (1), Second Alcibiades (2), Hipparchus (2), (The)