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
As the Greek, when he sacrificed, raised his eyes to heaven, so the Roman veiled his head; for the prayer of the former was contemplation, that of the latter reflection. Throughout the whole of nature he adored the spiritual and the universal. To everything existing, to the man and to the tree, to the state and to the store-room, was assigned a spirit which came into being with it and perished along with it, the counterpart of the natural phenomenon in the spiritual domain; to the man the male Genius, to the woman the female Juno, to the boundary Terminus, to the forest Silvanus, to the circling year Vertumnus, and so on to every object after its kind. In occupations the very steps of the process were spiritualized: thus, for example, in the prayer for the husbandman there was invoked the spirit of fallowing, of ploughing, of furrowing, sowing, covering-in, harrowing, and so forth down to that of the in-bringing, up-storing, and opening of the granaries.
In like manner marriage, birth, and every other natural event were endowed with a sacred life. The larger the sphere embraced in the abstraction, the higher rose the god and the reverence paid by man. Thus Jupiter and Juno are the abstractions of manhood and womanhood; Dea Dia or Ceres, the creative power; Minerva, the power of memory; Dea Bona, or among the Samnites Dea Cupra, the good deity. While to the Greek everything assumed a concrete and corporeal shape, the Roman could only make use of abstract, completely transparent formulae; and while the Greek for the most part threw aside the old legendary treasures of primitive times, because they embodied the idea in too transparent a form, the Roman could still less retain them, because the sacred conceptions seemed to him dimmed even by the lightest veil of allegory. Not a trace has been preserved among the Romans even of the oldest and most generally diffused myths, such as that current among the Indians, the Greeks, and even the Semites, regarding a great flood and its survivor, the common ancestor of the present human race. Their gods could not marry and beget children, like those of the Greeks; they did not walk about unseen among mortals; and they needed no nectar. But that they, nevertheless, in their spirituality--which only appears tame to dull apprehension--gained a powerful hold on men's minds, a hold more powerful perhaps than that of the gods of Greece created after the image of man, would be attested, even if history were silent on the subject, by the Roman designation of faith (the word and the idea alike foreign to the Greeks), -Religlo-, that is to say, "that which binds." As India and Iran developed from one and the same inherited store, the former, the richly varied forms of its sacred epics, the latter, the abstractions of the Zend-Avesta; so in the Greek mythology the person is predominant, in the Roman the idea, in the former freedom, in the latter necessity.
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Reference address : https://www.ellopos.net/elpenor/rome/1-02-earliest-migrations-italy.asp?pg=26