Posidonius (Greek: Ποσειδώνιος / Poseidonios) "of Apameia" (ὁ Ἀπαμεύς) or "of Rhodes" (ὁ Ῥόδιος) (ca. 135 BCE - 51 BCE), was a GreekGeorge Sarton (1936). "The Unity and Diversity of the Mediterranean World", Osiris 2, p. 406-463 [430]. Stoic philosopher, politician, astronomer, geographer, historian and teacher native to Apamea, Syria. Posidonius, Encyclopæ… (More on Posidonius)