Imperial provinces After
Augustus established the
Principate, the Emperor himself was the direct governor of Rome's most important provinces (called
imperial provinces) and even in the provinces he did not directly govern, was senior to other provincial governors through holding
imperium maius, or supreme
imperium. In imperial provinces, the Emperor would appoint
legates to govern in his name. The Emperor had sole say in the appointing of these legates, who were lower in rank than other provincial governors, as officially they were only representatives of the province's true governor, the Emperor. The Principate did not totally do away with the system of selecting proconsuls and propraetors. In provinces with one legion, a legate bearing praetorian
imperium, thus being a propraetor, not only governed the province in the Emperor's name but also controlled the legion himself. However, in provinces with more than one legion, each legion was commanded by its own legate with praetorian
imperium, while the province as a whole was commanded by a legate with consular
imperium, who had general command over the entire army stationed there, as well as administering the province as a proconsul. Appointment to these governorships was completely at the whim of the Emperor and could last anywhere from one to five years.
Senatorial provinces While the Emperor had sole authority in provinces with legions,
senatorial provinces were provinces where the Senate had the right to appoint governors. These provinces were away from the Empire's borders and free from the likelihood of rebellion, and so had few, if any, legions stationed in them (thus lessening the chance the Senate might try to seize power from the Emperor). These provinces were under the authority of proconsular or propraetorian senators invariably styled 'proconsul', with little need for intervention by the Emperor (although the Emperor had the power to appoint these governors if he wished). Most senatorial provinces, since they were not under the direct authority of the Emperor, did not grant the governor legions to command. There was one exception to this rule, the
province of Africa, where there was always at least a single legion to protect the province from
Berber tribes. Augustus decreed that at least ten provinces would be held by the authority of the Roman people through the agency of the Senate. Though all ten were "proconsular", only two of these provinces (
Asia and Africa), were actually governed by senators with proconsular
imperium, the remaining eight being governed by propraetors. The two proconsular governors served for one year, while the eight praetors served typically for up to three years. Each of these men had six lictors who served as bodyguards and also as a symbol of authority and a mark of their position.
Equestrian procurator The Emperor also had under his control a number of smaller, but potentially difficult provinces that did not need an entire legion. These provinces were put under the control of governors of
equestrian status. New conquests generally fell into this equestrian category, but most were later changed in status to reflect the changing conditions of Rome's growing empire. Thus, on conquest, a province would become a procuratorial province until it was decided that it should become either an imperial or senatorial province and thus governed by either a propraetor or proconsul. Like the other imperial provinces, the equestrian governors could serve any length of time up to five years, or even longer. Much like the senatorial province of Africa, the equestrian province of
Roman Egypt was an exception to the general rule of legions only being stationed in imperial provinces. Egypt was not a normal province; it was considered the personal possession of the Emperor, and its governor, the
praefectus Aegypti, was considered the hold the highest ranking equestrian post during the early Empire. Later, the post would fall second to that of the praetorian command, but its position remained highly prestigious. Though the practice of appointing
equestrians to help manage provinces officially began with Augustus, governors from years before had appointed procurators to help them govern. However, it was not until the reign of
Claudius that these
procurators received the powers of a governor. Procurators were civilian officials, unlike
prefects. Procurators were not magistrates, so did not possess
imperium, and merely exercised the Emperor's, or governor's, authority with his approval. ==Late imperial governors==