Ancient greek thinker

Why was Plato a famouse greek thinker, what did he discover?

 Plato helped to lay the foundations of Western Philosophy and science

About Plato

Plato was born around the year 428 BCE in Athens. His father died while Plato was young, and his mother remarried to Pyrilampes, in whose house Plato would grow up. Plato's birth name was Aristocles, and he gained the nickname Platon, meaning broad, because of his broad build. His family had a history in politics, and Plato was destined to a life in keeping with this history. He studied at a gymnasium owned by Dionysios, and at the palaistra of Ariston of Argos. When he was young he studied music and poetry. According to Aristotle, Plato developed the foundations of his metaphysics and epistemology by studying the doctrines of Cratylus, and the work of Pythagoras and Parmenides. When Plato met Socrates, however, he had met his definitive teacher. As Socrates' disciple, Plato adopted his philosophy and style of debate, and directed his studies toward the question of virtue and the formation of a noble character.Plato was in military service from 409 BC to 404 BC. When the Peloponnesian War ended in 404 BC he joined the Athenian oligarchy of the Thirty Tyrants, one of whose leaders was his uncle Charmides. The violence of this group quickly prompted Plato to leave it. In 403 BC, when democracy was restored in Athens, he had hopes of pursuing his original goal of a political career. Socrates' execution in 399 BC had a profound effect on Plato, and was perhaps the final event that would convince him to leave Athenian politics forever.
This is another picture of Plato