At the end of the year the cohort usually on guard during the games was withdrawn, that there might be a greater show of freedom, that the soldiery too might be less demoralised when no longer in contact with the licence of the theatre, and that it might be proved whether the populace, in the absence of a guard, would maintain their self-control. The emperor, on the advice of the augurs, purified Rome by a lustration, as the temples of Jupiter and Minerva had been struck by lightning.