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
Incipient Influence of the Monarchy
Towards the end of this period, however, there appears with the commencement of the monarchy the beginning of a better time also in art. We have already mentioned the mighty stimulus which building in the capital received, and building throughout the empire was destined to receive, through Caesar. Even in the cutting of the dies of the coins there appears about 700 a remarkable change; the stamping, hitherto for the most part rude and negligent, is thenceforward managed with more delicacy and care.
We have reached the end of the Roman republic. We have seen it rule for five hundred years in Italy and in the countries on the Mediterranean; we have seen it brought to ruin in politics and morals, religion and literature, not through outward violence but through inward decay, and thereby making room for the new monarchy of Caesar. There was in the world, as Caesar found it, much of the noble heritage of past centuries and an infinite abundance of pomp and glory, but little spirit, still less taste, and least of all true delight in life. It was indeed an old world; and even the richly-gifted patriotism of Caesar could not make it young again. The dawn does not return till after the night has fully set in and run its course. But yet with him there came to the sorely harassed peoples on the Mediterranean a tolerable evening after the sultry noon; and when at length after a long historical night the new day dawned once more for the peoples, and fresh nations in free self-movement commenced their race towards new and higher goals, there were found among them not a few, in which the seed sown by Caesar had sprung up, and which owed, as they still owe, to him their national individuality.
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Reference address : http://www.ellopos.net/elpenor/rome/5-12-religion-culture-literature-art.asp?pg=97