The cults of Cybele, Isis, Mithras, and Sol Invictus were particularly important. Some of those were initiatory religions of intense personal significance, similar to Christianity in those respects. In the early Imperial era, the princeps (lit. "first" or "foremost" among citizens) was offered "genius"-cult as the symbolic "paterfamilias" of Rome. His cult had further precedents: popular, unofficial cult offered to powerful benefactors in Rome: the kingly, god-like honours granted a Roman general on the day of his triumph; and in the divine honours paid to Roman magnates in the Greek East from at least 195 BC. The deification of deceased emperors had precedent in Roman domestic cult to the "dii parentes" (deified ancestors) and the mythic apotheosis of Rome's founders. A deceased emperor granted apotheosis by his successor and the Senate became an official State "divus" (divinity). Members of the Imperial family could be granted similar honours and cult; an Emperor's deceased wife, sister or daughter could be promoted to "diva" (female divinity). The first and last Roman known as a living "divus" was Julius Caesar, who seems to have aspired to divine monarchy; he was murdered soon after. Greek allies had their own traditional cults to rulers as divine benefactors, and offered similar cult to Caesar's successor, Augustus, who accepted with the cautious proviso that expatriate Roman citizens refrain from such worship; it might prove fatal. By the end of his reign, Augustus had appropriated Rome's political apparatus – and most of its religious cults – within his "reformed" and thoroughly integrated system of government. Towards the end of his life, he cautiously allowed cult to his "numen". By then the Imperial cult apparatus was fully developed, first in the Eastern Provinces, then in the West. Provincial Cult centres offered the amenities and opportunities of a major Roman town within a local context; bathhouses, shrines and temples to Roman and local deities, amphitheatres and festivals. In the early Imperial period, the promotion of local elites to Imperial priesthood gave them Roman citizenship. In an empire of great religious and cultural diversity, the Imperial cult offered a common Roman identity and dynastic stability. In Rome, the framework of government was recognisably Republican. In the Provinces, this would not have mattered; in Greece, the emperor was "not only endowed with special, super-human abilities, but... he was indeed a visible god" and the little Greek town of Akraiphia could offer official cult to "liberating Zeus Nero for all eternity".