Diogenes Babylonius

Diogenes of Babylon (c. 230-c. 150/140 BCE) was a Greek Stoic philosopher who became head of the Stoic school at Athens. He contributed to Stoic logic, ethics, and theory of language, and he was one of three philosophers sent on a famous embassy from Athens to Rome in 155 BCE, an event that helped introduce Greek philosophy to Roman audiences. His writings are lost.