and decapitation. Imperial era Following Caesar's murder, Octavian assumed the permanent title of imperator and became the permanent head of the Senate from 27 BCE (see principate) under the title and name Augustus. Only the year before, he had blocked the senatorial award of a triumph to Marcus Licinius Crassus the Younger, despite the latter's acclamation in the field as Imperator and his fulfillment of all traditional, Republican qualifying criteria except full consulship. Technically, generals in the Imperial era were legates of the ruling Emperor (Imperator). Augustus claimed the victory as his own but permitted Crassus a second, which is listed on the Fasti for 27 BCE. Crassus was also denied the rare (and technically permissible, in his case) honour of dedicating the spolia opima of this campaign to Jupiter Feretrius. The last triumph listed on the Fasti Triumphales is for 19 BCE. By then, the triumph had been absorbed into the Augustan Imperial cult system, in which only the emperor would be accorded such a supreme honour, as he was the supreme Imperator. The Senate, in true Republican style, would have held session to debate and decide the merits of the candidate; but this was little more than good form. Augustan ideology insisted that Augustus had saved and restored the Republic, and it celebrated his triumph as a permanent condition, and his military, political, and religious leadership as responsible for an unprecedented era of stability, peace, and prosperity. From then on, emperors claimed – without seeming to claim – the triumph as an Imperial privilege. Those outside the Imperial family might be granted "triumphal ornaments" (Ornamenta triumphalia) or an ovation, such as Aulus Plautius under Claudius. The senate still debated and voted on such matters, though the outcome was probably already decided. In the Imperial era, the number of triumphs fell sharply. Imperial panegyrics of the later Imperial era combine triumphal elements with Imperial ceremonies such as the consular investiture of Emperors, and the adventus, the formal "triumphal" arrival of an emperor in the various capitals of the Empire in his progress through the provinces. Some emperors were perpetually on the move and seldom or never went to Rome. Christian emperor Constantius II entered Rome for the first time in his life in 357, several years after defeating his rival Magnentius, standing in his triumphal chariot "as if he were a statue". Theodosius I celebrated his victory over the