Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
We know still less, if possible, of Sabellian art; but that of course by no means warrants the inference that it was inferior to that of the neighbouring stocks. On the contrary, it may be conjectured from what we otherwise know of the character of the three chief races of Italy, that in artistic gifts the Samnites approached nearest to the Greeks and the Etruscans were farthest removed from them; and a sort of confirmation of this hypothesis is furnished by the fact, that the most gifted and most original of the Roman poets, such as Naevius, Ennius, Lucilius, and Horace, belonged to the Samnite lands, whereas Etruria has almost no representatives in Roman literature except the Arretine Maecenas, the most insufferable of all heart-withered and affected(17) court-poets, and the Volaterran Persius, the true ideal of a conceited and languid, poetry-smitten, youth.
17. Literally "word-crisping," in allusion to the -calamistri Maecenatis-.
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Reference address : https://www.ellopos.net/elpenor/rome/1-15-art.asp?pg=29