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
The New Court - The New Patrician Nobility
But, whatever may have been the definitive title present to his thoughts the sovereign ruler was there, and accordingly the court established itself at once with all its due accompaniments of pomp, insipidity, and emptiness. Caesar appeared in public not in the robe of the consuls which was bordered with purple stripes, but in the robe wholly of purple which was reckoned in antiquity as the proper regal attire, and received, seated on his golden chair and without rising from it, the solemn procession of the senate. The festivals in his honour commemorative of birthday, of victories, and of vows, filled the calendar. When Caesar came to the capital, his principal servants marched forth in troops to great distances so as to meet and escort him.
To be near to him began to be of such importance, that the rents rose in the quarter of the city where he dwelt. Personal interviews with him were rendered so difficult by the multitude of individuals soliciting audience, that Caesar found himself compelled in many cases to communicate even with his intimate friends in writing, and that persons even of the highest rank had to wait for hours in the antechamber. People felt, more clearly than was agreeable to Caesar himself, that they no longer approached a fellow-citizen. There arose a monarchical aristocracy, which was in a remarkable manner at once new and old, and which had sprung out of the idea of casting into the shade the aristocracy of the oligarchy by that of royalty, the nobility by the patriciate.
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Reference address : https://www.ellopos.net/elpenor/rome/5-11-old-republic-new-monarchy.asp?pg=42