Praxiphanes (Greek: Πραξιφάνης) a Peripatetic philosopher, was a native of Mytilene, who lived a long time in Rhodes.[1] He lived in the time of Demetrius Poliorcetes and Ptolemy I Soter, and was a pupil of Theophrastus, about 322 BC.[2] He subsequently opened a school himself, in which Epicurus is said to have been one of his pupils.[3] Praxiphanes paid special attention to grammatical studies, and is hence named along with Aristotle as the founder and creator of the science of grammar.[4][5]