Conversation so far:
What is one recurrent theme mentioned by Plato?
The trial of Socrates and his death sentence is the central, unifying event of Plato's dialogues.
Are there any other interesting aspects about the Plato article?
Many have interpreted Plato as stating—even having been the first to write—that knowledge is justified true belief, an influential view that informed future developments in epistemology.
Is there more to Plato's idea that knowledge is justified true belief?
This interpretation is based on the Theaetetus, wherein Plato argues that knowledge is distinguished from mere true belief by the knower having an account of the object of true belief.
What other beliefs did Plato have besides the idea that knowledge is justified true belief?
Plato viewed The Good as the supreme Form, somehow existing even beyond being.
Does Plato describe his view on the afterlife?
Plato advocates a belief in the immortality of the soul, and several dialogues end with long speeches imagining the afterlife.

Question: What other things did he write about?
Self-contained rewrite: What other things did Plato write about besides the immortality of the soul and knowledge as justified true belief?