Senatorial province in the context of "Roman empire"

During the classical period, the Roman Empire controlled the Mediterranean and much of Europe, Western Asia, and North Africa. The Romans conquered most of these territories in the time of the Republic, and it was ruled by emperors following Octavian's assumption of power in 27 BC. Over the 4th century AD, the empire split into western and eastern halves. The western empire collapsed in 476 AD, while the eastern empire endured until the fall of Constantinople in 1453.

By 100 BC, the city of Rome had expanded its rule from the Italian peninsula to most of the Mediterranean and beyond. However, it was severely destabilised by civil wars and political conflicts, which culminated in the victory of Octavian over Mark Antony and Cleopatra at the Battle of Actium in 31 BC, and the subsequent conquest of the Ptolemaic Kingdom in Egypt. In 27 BC, the Roman Senate granted Octavian overarching military power (imperium) and the new title of Augustus, marking his accession as the first Roman emperor. The vast Roman territories were organized into senatorial provinces, governed by proconsuls who were appointed by lot annually, and imperial provinces, which belonged to the emperor but were governed by legates.

During the Roman Empire, the governor of Roman Egypt (praefectus Aegypti) was a prefect who administered the Roman province of Egypt with the delegated authority (imperium) of the emperor.

Egypt was established as a Roman province in consequence of the Battle of Actium, where Cleopatra as the last independent ruler of Egypt and her Roman ally Mark Antony were defeated by Octavian, the adopted heir of the assassinated Roman dictator Julius Caesar. Octavian then rose to supreme power with the title Augustus, ending the era of the Roman Republic and installing himself as princeps, the so-called "leading citizen" of Rome who in fact acted as an autocratic ruler. Although senators continued to serve as governors of most other provinces (the senatorial provinces), especially those annexed under the Republic, the role of Egypt during the civil war with Antony and its strategic and economic importance prompted Augustus to ensure that no rival could secure Aegyptus as an asset. He thus established Egypt as an imperial province, to be governed by a prefect he appointed from men of the equestrian order.

The Roman legion (Latin: legiō, Latin: [ˈɫɛɡioː]) was the largest military unit of the Roman army, composed of Roman citizens serving as legionaries. During the Roman Republic the manipular legion comprised 4,200 infantry and 300 cavalry. In late Republican times the legions were formed of 5,200 men and were restructured around 10 cohorts, the first cohort being double strength. This structure persisted throughout the Principate and middle Empire, before further changes in the fourth century resulted in new formations of around 1,000 men.

Asia (Ancient Greek: Ἀσία) was a Roman province covering most of western Asia Minor (Anatolia, Turkey), which was created following the Roman Republic's annexation of the Attalid Kingdom in 133 BC. After the establishment of the Roman Empire by Augustus, it was the most prestigious senatorial province and was governed by a proconsul. That arrangement endured until the province was subdivided in the fourth century AD.

The province was one of the richest of the Empire and was at peace for most of the Imperial period. It contained hundreds of largely self-governing Greek city-states, who competed fiercely with one another for status, through appeals to the Imperial authorities and the cultivation of prestigious cultural institutions such as festival games, religious cults, and oratory.

Crete and Cyrenaica (Latin: Creta et Cyrenaica, Koine Greek: Κρήτη καὶ Κυρηναϊκή, romanized: Krḗtē kaì Kyrēnaïkḗ) was a senatorial province of the Roman Republic and later the Roman Empire, established in 67 BC, which included the island of Crete and the region of Cyrenaica in modern-day Libya. These areas were settled by Greek colonists from the eighth to sixth centuries BC. After Alexander the Great's death, his short-lived empire was partitioned between his generals during the Wars of the Diadochi. Cyrenaica ended up under Egyptian rule, except for Crete, which remained independent.

The province of Epirus (Latin: Provincia Epiri, Koine and Medieval Greek: Ἐπαρχία Ἠπείρου, Eparchía Ēpeírou) was a province of the Roman Empire, covering the region of Ancient Epirus. Rome first annexed the region in 167 BC, in the aftermath of the Third Macedonian War, and initially put the region in the larger Roman province of Macedonia, which at the time covered the whole of the Hellenistic world in mainland Europe. In 27 BC, Epirus and Achaea were separated from Macedonia and grouped into the senatorial province of Achaea, with the exception of its northernmost part, which remained part of the province of Macedonia. Under Emperor Trajan, sometime between 103 and 114 AD, Epirus became a separate province, under a procurator Augusti. The new province extended from the Gulf of Aulon (Vlorë) and the Acroceraunian Mountains in the north to the lower course of the Acheloos River in the south, and included the northern Ionian Islands of Corfu, Lefkada, Ithaca, Cephallonia, and Zakynthos.