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
Of all the Phoenician settlements none attained a more rapid and secure prosperity than those which were established by the Tyrians and Sidonians on the south coast of Spain and the north coast of Africa-- regions that lay beyond the reach of the arm of the great-king and the dangerous rivalry of the mariners of Greece, and in which the natives held the same relation to the strangers as the Indians in America held to the Europeans. Among the numerous and flourishing Phoenician cities along these shores, the most prominent by far was the "new town," Karthada or, as the Occidentals called it, Karchedon or Carthago.
Although not the earliest settlement of the Phoenicians in this region, and originally perhaps a dependency of the adjoining Utica, the oldest of the Phoenician towns in Libya, it soon outstripped its neighbours and even the motherland through the incomparable advantages of its situation and the energetic activity of its inhabitants. It was situated not far from the (former) mouth of the Bagradas (Mejerda), which flows through the richest corn district of northern Africa, and was placed on a fertile rising ground, still occupied with country houses and covered with groves of olive and orange trees, falling off in a gentle slope towards the plain, and terminating towards the sea in a sea-girt promontory.
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=8