Diocletian was a Roman emperor from 284 to 305. Born to a family of low status in Dalmatia, Diocletian rose through the ranks of the military to become a cavalry commander of the Emperor Carus's army. After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was proclaimed emperor. The title was also claimed by Carus's surviving son, Carinus, but Diocletian defeated him in the Battle of the Margus.
Justinian II, surnamed Rhinotmetos or Rhinotmetus, was the last Byzantine Emperor of the Heraclian dynasty, reigning from 685 to 695 and again from 705 to 711. Like his predecessor of the same name, Justinian II was an ambitious and passionate ruler who was keen to restore the Roman Empire to its former glories, but he responded brutally to any opposition to his will and lacked the finesse of his father, Constantine IV. Consequently, he generated enormous opposition to his reign, resulting in his deposition in 695 in a popular uprising, and he only returned to the throne in 705 with the help of a Bulgar and Slav army. His second reign was even more despotic than the first, and it too saw his eventual overthrow in 711, abandoned by his army who turned on him before killing him.
Michael I Rhangabe was Byzantine Emperor from 811 to 813.
The themes or thémata were the main military/administrative divisions of the middle Byzantine Empire. They were established in the mid-7th century in the aftermath of the Slavic invasion of the Balkans and Muslim conquests of parts of Byzantine territory, and replaced the earlier provincial system established by Diocletian and Constantine the Great. In their origin, the first themes were created from the areas of encampment of the field armies of the East Roman army, and their names corresponded to the military units that had existed in those areas. The theme system reached its apogee in the 9th and 10th centuries, as older themes were split up and the conquest of territory resulted in the creation of new ones. The original theme system underwent significant changes in the 11th and 12th centuries, but the term remained in use as a provincial and financial circumscription until the very end of the Empire.
Leontios or Leontius was Byzantine emperor from 695 to 698. Little is known of his early life, other than that he was born in Isauria in Asia Minor. He was given the title of patrikios, and made strategos of the Anatolic Theme under Emperor Constantine IV. He led forces against the Umayyads during the early years of Justinian II's reign, securing victory and forcing the Umayyad caliph, Abd al-Malik ibn Marwan, to sue for peace.
The Roman province of Egypt was established in 30 BC after Octavian defeated his rival Mark Antony, deposed Pharaoh Cleopatra, and annexed the Ptolemaic Kingdom to the Roman Empire. The province encompassed most of modern-day Egypt except for the Sinai Peninsula, which would later be conquered by Trajan. Aegyptus was bordered by the provinces of Crete and Cyrenaica to the west and Judea to the East.
The Exarchate of Africa was a division of the Byzantine Empire centered around Carthage, Tunisia, which encompassed its possessions on the Western Mediterranean. Ruled by an exarch (viceroy) it was established by the Emperor Maurice in the late 580s and survived until the Muslim conquest of the Maghreb in the late 7th century. It was one of two exarchates established following the western reconquests under Emperor Justinian I to more effectively administer the territories, along with the Exarchate of Ravenna.
Kharāj is a type of individual Islamic tax on agricultural land and its produce developed under Islamic law.
The limitanei or ripenses, meaning respectively "the soldiers in frontier districts" or "the soldiers on the riverbank", were an important part of the late Roman and early Byzantine army after the reorganizations of the late 3rd and early 4th centuries. The limitanei, unlike the comitatenses, palatini, and scolae, garrisoned fortifications along the borders of the Roman Empire and were not normally expected to fight far from their fortifications.
The early Muslim conquests, also referred to as the Arab conquests and the early Islamic conquests began with the Islamic prophet Muhammad in the 7th century. He established a new unified polity in the Arabian Peninsula which under the subsequent Rashidun and Umayyad Caliphates saw a century of rapid expansion.
In the late Roman Empire and the Early Middle Ages a colonus was a tenant farmer. Known collectively as the "colonate", these farmers operated as sharecroppers, paying landowners with a portion of their crops in exchange for use of their farmlands. The coloni's tenant-landlord relationship eventually degraded into one of debt and dependence. As a result, the colonus system became a new type of land tenancy, placing the occupants in a state between freedom and slavery. Colonus system can be considered as predecessor of European feudal serfdom.
The Byzantine economy was among the most robust economies in the Mediterranean for many centuries. Constantinople was a prime hub in a trading network that at various times extended across nearly all of Eurasia and North Africa. Some scholars argue that, up until the arrival of the Arabs in the 7th century, the Eastern Roman Empire had the most powerful economy in the world. The Arab conquests, however, would represent a substantial reversal of fortunes contributing to a period of decline and stagnation. Constantine V's reforms marked the beginning of a revival that continued until 1204. From the 10th century until the end of the 12th, the Byzantine Empire projected an image of luxury, and the travelers were impressed by the wealth accumulated in the capital. All this changed with the arrival of the Fourth Crusade, which was an economic catastrophe. The Palaiologoi tried to revive the economy, but the late Byzantine state would not gain full control of either the foreign or domestic economic forces.
In the Late Roman Empire, usually dated 284 AD to 602 AD, the regional governance district known as the Roman or civil diocese was made up of a grouping of provinces headed by vicars of praetorian prefects. There were initially twelve dioceses, rising to fourteen by 380.
The Byzantine Empire was ruled by emperors of the dynasty of Heraclius between 610 and 711. The Heraclians presided over a period of cataclysmic events that were a watershed in the history of the Empire and the world in general.
The Diocese of the East was a diocese of the later Roman Empire, incorporating the provinces of the western Middle East, between the Mediterranean Sea and Mesopotamia. During late Antiquity, it was one of the major commercial, agricultural, religious and intellectual areas of the empire, and its strategic location facing the Sassanid Empire and the unruly desert tribes gave it exceptional military importance.
The East Roman army refers to the army of the eastern section of the Roman Empire, from the empire's definitive split in 395 AD to the army's reorganization by themes after the permanent loss of Syria, Palestine and Egypt to the Arabs in the 7th century during the Byzantine-Arab Wars. The East Roman army is the continuation of the Late Roman army of the 4th century until the Byzantine army of the 7th century onwards.
This history of the Byzantine Empire covers the history of the Eastern Roman Empire from late antiquity until the Fall of Constantinople in 1453 AD. Several events from the 4th to 6th centuries mark the transitional period during which the Roman Empire's east and west divided. In 285, the emperor Diocletian partitioned the Roman Empire's administration into eastern and western halves. Between 324 and 330, Constantine I transferred the main capital from Rome to Byzantium, later known as Constantinople and Nova Roma. Under Theodosius I, Christianity became the Empire's official state religion and others such as Roman polytheism were proscribed. And finally, under the reign of Heraclius, the Empire's military and administration were restructured and adopted Greek for official use instead of Latin. Thus, although it continued the Roman state and maintained Roman state traditions, modern historians distinguish Byzantium from ancient Rome insofar as it was oriented towards Greek rather than Latin culture, and characterised by Orthodox Christianity rather than Roman polytheism.
Byzantium under the Constantinian and Valentinianic dynasties was the earliest period of the Byzantine history that saw a shift in government from Rome in the west to Constantinople in the East within the Roman Empire under emperor Constantine the Great and his successors. Constantinople, formally named Nova Roma, was founded in the city of Byzantium, which is the origin of the historiographical name for the Eastern Empire, which self-identified simply as the "Roman Empire".
The Byzantine–Sasanian War of 602–628 was the final and most devastating of the series of wars fought between the Byzantine Empire and the Sasanian Empire of Iran. The previous war between the two powers had ended in 591 after Emperor Maurice helped the Sasanian king Khosrow II regain his throne. In 602 Maurice was murdered by his political rival Phocas. Khosrow proceeded to declare war, ostensibly to avenge the death of the deposed emperor Maurice. This became a decades-long conflict, the longest war in the series, and was fought throughout the Middle East: in Egypt, the Levant, Mesopotamia, the Caucasus, Anatolia, Armenia, the Aegean Sea and before the walls of Constantinople itself.
Taxation in the Ottoman Empire changed drastically over time, and was a complex patchwork of different taxes, exemptions, and local customs.