There was, however, a danger that the rising generation might soon come to accept the benefits of peace as a matter of course, without definitely realising to whom they owed these blessings, and it was therefore desirable to keep in remembrance among the emperor’s contemporaries the difference between the unquiet past and the blissful present, and to give official recognition to the fact that the period of civil war was over and that a century of peace and prosperity had taken its place. Such turning-points imply an invitation to take a backward glance and to reckon the sum of development up to this point. So had a poet done at the end of the previous century: “How fair, O man, with thy palm-branches Standest thou in the century’s decline,” etc. The Rome of the period was also to take a backward glance. As the senate had solemnly marked the end of the wars by closing the temple of Janus, so Augustus desired to mark the end of the period of reorganisation and reconstitution by an imposing symbolical act. Even the ordinary Roman census was not a mere counting up of the people; it was a reconstitution of the ranks of Roman citizenship, and if this tedious and toilsome preparatory labour were to attain legal validity, it must find its ratification and consummation in a final act in which the whole nation should be purified with the most solemn religious rites and commended to the propitious gods for the future. Similarly Augustus had been at work since the year 29 on a reorganisation of Rome, which was finally declared complete in the year 17 by a mighty lustrum, the Secular Festival.