http://agathe.gr/guide/stoa_poikile.html
Stoa Poikile Across modern Hadrian Street are the most recent excavations (2003), along the north side of the square. Here have been revealed the remains of another large stoa, identified on the basis ... Among those who plied their trade in the building were the philosophers of Athens, in particular Zeno, who came to Athens from Cyprus in ca. 300 B.C. and so preferred the Painted Stoa as his classroom that he and his followers became known as the Stoics. "Zeno, son of Mnaseas or Demeas of Kition [in Cyprus], a philosopher who began the Stoic school.