Suetonius Divus Augustus 30

He divided the city into regions and districts, ordaining that the annual magistrates should take by lot the charge of the former; and that the latter should be superintended by wardens chosen out of the people of each neighbourhood. He appointed a nightly watch to be on their guard against accidents from fire; and, to prevent the frequent inundations, he widened and cleansed the bed of the Tiber , which had in the course of years been almost dammed up with rubbish, and the channel narrowed by the ruins of houses. ¹ To render the approaches to the city more commodious, he took upon himself the charge of repairing the Flaminian way as far as Ariminum , ² and distributed the repairs of the other roads amongst several persons who had obtained the honour of a triumph; to be defrayed out of the money arising from the spoils of war. Temples decayed by time, or destroyed by fire, he either repaired or rebuilt; and enriched them, as well as many others, with splendid offerings. On a single occasion, he deposited in the cell of the temple of Jupiter Capitolinus, sixteen thousand pounds of gold, with jewels and pearls to the amount of fifty millions of sesterces.