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
A scaffolding of boards was erected at the expense of the state in the Circus for the first three days, and suitable representations were provided on it for the entertainment of the multitude. That matters might not be carried too far however in this way, a fixed sum of 200,000 -asses- (2055 pounds) once for all appropriated from the exchequer for the expenses of the festival; and the sum was not increased up to the period of the Punic wars. The aediles, who had to expend this sum, were obliged to defray any additional amount out of their own pockets; and it is not probable that they at this time contributed often or considerably from their own resources.
That the new stage was generally under Greek influence, is proved by its very name (-scaena-, --skene--). It was no doubt at first designed merely for musicians and buffoons of all sorts, amongst whom the dancers to the flute, particularly those then so celebrated from Etruria, were probably the most distinguished; but a public stage had at any rate now arisen in Rome and it soon became open also to the Roman poets.
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Reference address : https://www.ellopos.net/elpenor/rome/2-09-art-science.asp?pg=3