This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Zeno of Citium's own path into philosophy began with a disaster rather than a plan: a shipwreck off the Athenian coast cost the Cypriot merchant his cargo, and it was that loss, by the tradition later writers preserved, that brought him to a bookseller's stall in Athens, where he read Xenophon's Memorabilia and asked where a man like Socrates could be found. He was pointed to the Cynic philosopher Crates of Thebes, studied under him, and later studied under the Megarian Stilpo and others moving in the Academy's orbit before founding a school of his own.
Around 300 BCE he began teaching in his own right at the Stoa Poikile, the Painted Colonnade on the north side of the Athenian agora, and the school took its name, Stoicism, directly from that porch. His own core teaching held that the cosmos is ordered by a single rational principle, the logos, and that virtue, understood as living in agreement with that reason, is the only true good, reducing wealth, health and reputation to matters of indifference rather than to goods worth pursuing for their own sake.
Diogenes Laertius records that Zeno died at about seventy two, a dating he traces to the testimony of Zeno's own disciple Persaeus of Citium, and that Athens honored him after death with a golden crown and a public burial at the city's own expense, an honor Diogenes Laertius preserves by quoting the city's decree directly. The training under Stilpo that a Megarian focused account remembers chiefly for its later Stoic fingerprints sits, in Zeno's own story, as one stop inside a longer, disaster driven path from shipwrecked merchant to honored founder.