List of Roman emperors in the context of "Barbarian kingdoms"

Constantine VIII (Greek: Κωνσταντῖνος, romanized: Kōnstantīnos; 960 – 11/12 November 1028) was de jure Byzantine emperor from 962 until his death. He was the younger son of Emperor Romanos II and Empress Theophano. He was nominal co-emperor from 962, successively with his father; stepfather, Nikephoros II Phokas; uncle, John I Tzimiskes; and brother, Basil II. Basil's death in 1025 left Constantine as the sole emperor. He occupied the throne for 66 years in total, making him de jure the longest-reigning amongst all Roman emperors since Augustus.

Constantine displayed a lifelong lack of interest in politics, statecraft and the military, and during his brief sole reign the government of the Byzantine Empire suffered from mismanagement and neglect. He had no sons and was instead succeeded by Romanos Argyros, husband of his daughter Zoe.

Adoption in ancient Rome was primarily a legal procedure for transferring paternal power (potestas) to ensure succession in the male line within Roman patriarchal society. The Latin word adoptio refers broadly to "adoption", which was of two kinds: the transferral of potestas over a free person from one head of household to another; and adrogatio, when the adoptee had been acting sui iuris as a legal adult but assumed the status of unemancipated son for purposes of inheritance. Adoptio was a longstanding part of Roman family law pertaining to paternal responsibilities such as perpetuating the value of the family estate and ancestral rites (sacra), which were concerns of the Roman property-owning classes and cultural elite. During the Principate, adoption became a way to ensure imperial succession.

In contrast to modern adoption, Roman adoptio was neither designed nor intended to build emotionally satisfying families and support childrearing. Among all social classes, childless couples or those who wanted to expand the size of their families instead might foster children. Evidence is meager for the adoptio of young children for purposes other than securing a male heir, and probably would have been employed mostly by former slaves legitimating the status of their own children born into slavery or outside a legally valid marriage.

Anastasius I Dicorus (Ancient Greek: Ἀναστάσιος, romanized: Anastásios; c. 431 – 9 July 518) was Roman emperor from 491 to 518. A career civil servant, he came to the throne at the age of 61 after being chosen by Ariadne, the wife of his predecessor, Zeno. His reign was characterized by reforms and improvements in the empire's government, finances, economy and bureaucracy. The resulting stable government, reinvigorated monetary economy and sizeable budget surplus allowed the empire to pursue more ambitious policies under his successors, most notably Justinian I. Since many of Anastasius' reforms proved long-lasting, his influence over the empire endured for centuries.

Anastasius was a Monophysite Christian and his personal religious tendencies caused tensions throughout his reign in the empire that was becoming increasingly divided along religious lines.

Justin I (Latin: Iustinus; Ancient Greek: Ἰουστῖνος, romanized: Ioustînos; c. 450 – 1 August 527), also called Justin the Thracian (Latin: Iustinus Thrax; Ancient Greek: Ἰουστῖνος ὁ Θρᾷξ, romanized: Ioustînos ho Thrâix), was Roman emperor from 518 to 527. Born to a peasant family, he rose through the ranks of the army to become commander of the imperial guard and when Emperor Anastasius I Dicorus died, he out-maneouvered his rivals and was elected as his successor, in spite of being around 68 years old. His reign is significant for the founding of the Justinian dynasty that included his nephew, Justinian I, and three succeeding emperors. His consort was Empress Euphemia.

Justin was noted for his strongly Chalcedonian Christian views. This facilitated the ending of the Acacian schism between the churches of Rome and Constantinople, resulting in good relations between Justin and the papacy. Throughout his reign, he stressed the religious nature of his office and passed edicts against various Christian groups seen at the time as non-Orthodox. In foreign affairs, he used religion as an instrument of state. He endeavoured to cultivate client states on the borders of the Empire, and avoided any significant warfare until late in his reign.

The Illyrians (Illyrioi; Latin: Illyrii) were a conglomeration of Indo-European peoples and tribes in the Balkan Peninsula, Southeastern Europe. They spoke the Illyrian language and practiced a multitude of common religious and cultural practices. Many Illyrian groups formed a distinct tribal mode of social organisation, which survived much later in the form of the Albanian tribal system.

In late Iron Age and early classical antiquity, the first polities of the area would be created by tribal groupings, including the Taulantii and Dardani. The most powerful Illyrian states of the area, the Ardiaean kingdom, emerged in the 3rd century BC during the rule of Agron and Teuta. The Illyrians came into conflict with Roman Republic and were defeated in the Illyrian Wars, which were followed by many revolts. The largest and last of them was the Great Illyrian Revolt (6-9 BC). The beginning of the integration of the region of Illyria in the Roman world followed the revolt and saw many Illyrians rise through the ranks of the Roman society and the Roman army in particular which produced several emperors of Illyrian origin.

Petrelë Castle (Albanian: Kalaja e Petrelës) is a castle in Petrelë, central Albania. Its history dates back to the 6th century, when it was built by the Byzantine emperor Justinian I. Petrelë Castle is 329 metres (1,079 ft) above sea level.

It is one of the tourist locations close to Tirana that attracts a great number of visitors. In the castle, the prominent wooden structure is a restaurant, perched on a rocky hill, above the village with the same name. It has a triangular shape with two observation towers. Although it was first built in ancient times, the present building dates from the 15th century.

Athanasius I of Alexandria (c. 296–298 – 2 May 373), also called Athanasius the Great, Athanasius the Confessor, or, among Coptic Christians, Athanasius the Apostolic, was a Christian theologian and the 20th patriarch of Alexandria (as Athanasius I). His intermittent episcopacy spanned 45 years (c. 8 June 328 – 2 May 373), of which over 17 encompassed five exiles, when he was replaced on the order of four different Roman emperors. Athanasius was a Church Father, the chief proponent of Trinitarianism against Arianism, and a noted Egyptian Christian leader of the fourth century.

Conflict with Arius and Arianism, as well as with successive Roman emperors, shaped Athanasius' career. In 325, at age 27, Athanasius began his leading role against the Arians as a deacon and assistant to Bishop Alexander of Alexandria during the First Council of Nicaea. Roman Emperor Constantine the Great had convened the council in May–August 325 to address the Arian position that the Son of God, Jesus of Nazareth, is of a distinct substance from the Father. Three years after that council, Athanasius succeeded his mentor as Patriarch of Alexandria. In addition to the conflict with the Arians (including powerful and influential Arian churchmen led by Eusebius of Nicomedia), he struggled against the Emperors Constantine, Constantius II, Julian the Apostate and Valens. He was known as Athanasius Contra Mundum (Latin for 'Athanasius Against the World').