The text "Tékhnē grammatiké" (c. 100 BCE, Gk. "gramma" meant letter, and this title means "Art of letters"), possibly written by Dionysius Thrax (170 – 90 BCE), is considered the earliest grammar book in the Greek tradition. It lists eight parts of speech and lays out the broad details of Greek morphology including the case structures. This text was intended as a pedagogic guide (as was Panini), and also covers punctuation and some aspects of prosody. Other grammars by Charisius (mainly a compilation of Thrax, as well as lost texts by Remmius Palaemon and others) and Diomedes (focusing more on prosody) were popular in Rome as pedagogic material for teaching Greek to native Latin-speakers.