Plato

* The Republic: Explores justice, the ideal state, and the theory of Forms [https://iep.utm.edu/republic/]. A very influential work in political philosophy.
* The Symposium: Discusses love (Eros) via speeches at a banquet. Covers different kinds of love, from physical to intellectual [https://blogs.baruch.cuny.edu/eng2800hma/?p=97].
* Phaedo: Socrates' final hours, focusing on the soul's immortality and the Forms. Examines death and philosophy.
* Theaetetus: Questions “What is knowledge?” through definitions and Socrates' method.
* Meno: Asks if virtue can be taught, introduces the theory of recollection.
* Apology: Socrates' defense at his trial. Shows his character and commitment to truth.
* Crito: Socrates and Crito debate escape from prison. Explores individual vs. state and obeying laws.
* Gorgias: Critiques rhetoric, its nature and potential for good/evil.
* Phaedrus: Discusses love, beauty, and the soul, using rhetoric and writing. Features the allegory of the charioteer.
* Protagoras: Debates whether virtue can be taught with the sophist Protagoras.

Note: This is a starting point. Other important dialogues exist (like *Euthyphro, Parmenides,* and *Timaeus*).