Plato is an Athenian philosopher. Plato’s exact birth year is unknown, but is widely believed to be between the years 431-427 B.C.E. Following Apollodorus’ chronology, Plato was born the same year Pericles died, was six months younger than Isocrates and died in his 80s(Some assumptions are 81, 82, and 84.) Diogenes’ claim that Plato was 28 when Socrates was put to death