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
Buildings of the Capital
Lastly, building in the capital, and the provision connected therewith of institutions for the public benefit, received from Caesar--who combined in himself the love for building of a Roman and of an organizer--a sudden stimulus, which not merely put to shame the mismanagement of the recent anarchic times, but also left all that the Roman aristocracy had done in their best days as far behind as the genius of Caesar surpassed the honest endeavours of the Marcii and Aemilii. It was not merely by the extent of the buildings in themselves and the magnitude of the sums expended on them that Caesar excelled his predecessors; but a genuine statesmanly perception of what was for the public good distinguishes what Caesar did for the public institutions of Rome from all similar services.
He did not build, like his successors, temples and other splendid structures, but he relieved the marketplace of Rome--in which the burgess-assemblies, the seats of the chief courts, the exchange, and the daily business-traffic as well as the daily idleness, still were crowded together--at least from the assemblies and the courts by constructing for the former a new -comitium-, the Saepta Julia in the Campus Martius, and for the latter a separate place of judicature, the Forum Julium between the Capitol and Palatine. Of a kindred spirit is the arrangement originating with him, by which there were supplied to the baths of the capital annually three million pounds of oil, mostly from Africa, and they were thereby enabled to furnish to the bathers gratuitously the oil required for the anointing of the body--a measure of cleanliness and sanitary policy which, according to the ancient dietetics based substantially on bathing and anointing, was highly judicious.
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Reference address : https://www.ellopos.net/elpenor/rome/5-11-old-republic-new-monarchy.asp?pg=94