Albanian is peculiarly interesting as the only surviving representative of the so-called Thraco-Illyrian group of languages which formed the primitive speech of the peninsula.
This school is first observable under the rule of Peisistratus at Athens in the 6th century B.C. Its doctrines are founded on two elements: the Thraco-Phrygian religion of Dionysus with its enthusiastic orgies, its mysteries and its purifications, and the tendency to philosophic speculation on the nature and mutual relations of the numerous gods, developed at this time by intercourse with Egypt and the East, and by the quickened intercourse between different tribes and different religions in Greece itself.
Albanian, the only surviving remnant of the ancient Thraco-Illyrian speech, affords an interesting study to philologists.
A similar suffix article is retained in Albanian, which almost certainly represents the original language of the Thraco-Illyrian tribes (see Albania); and these tribes belonged to the same ethnical and linguistic group as the Daco-Moesians represented by the Vlachs.