Posidonius (Greek: Ποσειδώνιος / Poseidonios) "of Rhodes" (ὠΡόδιος) or, alternatively, "of Apameia" (ὠΑπαμεÏÏ‚) (ca. 135 BCE - 51 BCE), was a Greek Stoic philosopher, politician, astronomer, geographer, historian, and teacher. He was acclaimed as the greatest polymath of his age. None of his vast body of work can be read in its entirety today as it exists only in fragments.