It was determined to join it to the city, not only by a wall, but likewise, for the sake of the convenience of passage, by a wooden bridge, then for the first time built across the Tiber.

The Fossa Quiritium, no inconsiderable defence against the easy access to the city from the low grounds, is the work of king Ancus.

The state being augmented by such great accessions, seeing that, amid such a multitude of persons, the distinction of right and wrong being as yet confounded, clandestine crimes were committed, a prison is built in the heart of the city, overlooking the forum, to intimidate the growing licentiousness.

And not only was the city increased under this king, but the territory also and the boundaries.
The Maesian forest was taken from the Veientes, the Roman dominion was extended as far as the sea, and the city of Ostia built at the mouth of the Tiber; salt-pits were formed around it, and, in consequence of the distinguished success achieved in war, the temple of Jupiter Feretrius was enlarged.
34.

In the reign of Ancus, Lucumo, a rich and enterprising man, came to settle at Rome, prompted chiefly by the desire and hope of obtaining great preferment there, which he had no means of attaining at Tarquinii (for there also he was descended from an alien stock).