|Art of Grammar|
The first grammars were created in India in the 5th century BCE (see Panini). The first western grammars were created by the Greeks in the 3rd century BCE.
There were many Greek grammarians, such as Rhyanus and Aristarchus of Samothrace, but the oldest existing treatise on Greek grammar is the Art of Grammar, purportedly written in the 2nd century BCE by Dionysius Thrax. Thrax's goal was to help Greek speakers better understand the language of the great Greek poets, such as Homer.
Note: Basing itself on the Greek model, the study of Latin grammar begins in the first century BCE with authors such as Orbilius Pupillus and Marcus Valerius Probus.