Eastern Roman empire in the context of "History of the Lombards"

Ammonius Hermiae (/əˈmoʊniəs/; Ancient Greek: Ἀμμώνιος ὁ Ἑρμείου, romanized: Ammōnios ho Hermeiou, lit. 'Ammonius, son of Hermias'; c. 440 – between 517 and 526) was a Greek philosopher from Alexandria in the eastern Roman empire during Late Antiquity. A Neoplatonist, he was the son of the philosophers Hermias and Aedesia, the brother of Heliodorus of Alexandria and the grandson of Syrianus. Ammonius was a pupil of Proclus in Roman Athens, and taught at Alexandria for most of his life, having obtained a public chair in the 470s.

According to Olympiodorus of Thebes's Commentaries on Plato's Gorgias and Phaedo texts, Ammonius gave lectures on the works of Plato, Aristotle, and Porphyry of Tyre, and wrote commentaries on Aristotelian works and three lost commentaries on Platonic texts. He is also the author of a text on the astrolabe published in the Catalogus Codicum Astrologorum Graecorum, and lectured on astronomy and geometry. Ammonius taught numerous Neoplatonists, including Damascius, Olympiodorus of Thebes, John Philoponus, Simplicius of Cilicia, and Asclepius of Tralles. Also among his pupils were the physician Gessius of Petra and the ecclesiastical historian Zacharias Rhetor, who became the bishop of Mytilene.

The Heruli (also Eluri, Eruli, Herules, Herulians) were one of the smaller Germanic peoples of Late Antiquity, known from records in the third to sixth centuries AD. The best recorded group of Heruli established a kingdom north of the Middle Danube, probably including the area north of present day Vienna. This kingdom was a neighbour to several other small and short-lived kingdoms in the late 5th century and early 6th century, including those of the Sciri, Rugii, Danubian Suebi, and Gepids. After the conquest of this Heruli kingdom by the Lombards in 508, splinter groups moved to Sweden, Ostrogothic Italy, and present-day Serbia, which was under Eastern Roman control.

The Danubian Heruli are generally equated to the "Elouri" who lived near the Sea of Azov during the late 3rd or early 4th century, and are believed to have migrated westwards. In 267-270 these Elouri took part together with Goths and other eastern European peoples in two massive raids into Roman provinces in the Balkans and Aegean Sea, attacking not only by land, but notably also by sea. The equation of these "ELuRi" with the "ERuLi" was made by several Byzantine authors, and is still widely accepted although some scholars such as Ellegård consider this equation uncertain, and propose that the Heruli homeland lay elsewhere. For example, because a group of 6th century Heruli moved from the Danube to Scandinavia, some scholars believe that the Heruli had their earliest origins in Scandinavia. There are also proposals that there were Heruli kingdoms in several parts of Europe, already in the 3rd and 4th century, perhaps with common origins in the north. One proposal, based upon indirect evidence, is that there was a "Western Heruli" settlement based near the Lower Rhine, because in 286 AD, only a few years after the eastern raids, the Heruli were defeated in an attack on Roman Gaul.

The Antes or Antae (Greek: Ἄνται) were an early Slavic tribal polity of the 6th century CE. They lived on the lower Danube River, in the northwestern Black Sea region (present-day Moldova and central Ukraine), and in the regions around the Don River (in Middle and Southern Russia). Scholars commonly associate the Antes with the archaeological Penkovka culture.

First mentioned in the historical record in 518, the Antes invaded the Eastern Roman Empire in the area of the Diocese of Thrace sometime between the years of 533 and 545. Thereafter, they became Byzantine foederati and received gold payments and a fort (named "Turris" – the Latin word turris means 'tower') somewhere north of the Danube at a strategically important location to prevent hostile barbarians from invading Roman lands. Thus from 545 to the 580s, Antean soldiers fought in various Byzantine campaigns. The Pannonian Avars, the Bulgars and the Khazars attacked the Antes in the 7th century, causing disappearance of the Antes as a group and of the Penkovka culture phenomenon.