It will be observed that Suetonius makes reference to brass plates, which Augustus had had inscribed with a narrative of his actions, to be placed before his mausoleum. It would appear that this biographical inscription, or a kindred one, was widely copied on tablets placed in the various temples dedicated to Augustus all over the empire. Fragments of this duplicate inscription from various ruins have been preserved, but by far the most complete one is that which was discovered in the sixteenth century, on a marble slab in the wall of the temple at Ancyra (the modern Angora) in Asia Minor; which, owing to the place of its discovery, is known as the _Monumentum Ancyranum_. This inscription, to which reference has already been made, supplies many important data as to the life of Augustus. It has a peculiar interest, because, as has been said, it is virtually autobiographical. In addition to the facts that it tabulates, it therefore gives interesting glimpses into the character of its author.[a] In a well-known passage of this inscription Augustus reviews his political career. In this review he does not begin with his adoption by Julius Cæsar, but he starts from the fact that in his nineteenth year he raised an army and saved the state on his own initiative and by his own resources. As an emperor upon whom old age was creeping, he looked back at the single landmarks of his rising career and saw the turning-point which decided his later destiny in this acquisition of an army of his own; according to him his political significance begins with the moment in which he became the head of an army. This right of exercising authority over the army, and indeed sole, undisputed authority, Cæsar had wanted to be sure of preserving at any cost for the future; this was the fundamental notion of his whole system, if that can be called a system which was indeed only a practice. The republic, too, could not do without its commanders, but it only left them for a year, or at the most a year and a half, in office. The innovation of the emperor’s time consisted in this, that the sole commander actually kept his power for a lifetime, held it simultaneously with other powerful offices, and even dared to exercise it in the capital itself. In order to maintain his army, he had been permanently invested with control of the important boundary provinces and with the permanent garrisons of the legions; as also with the right to supervise the other provinces, which were of course bound to supply their quota to the imperial army.