Hunnic Empire

State · 426–673 CE · at its largest around 451 CE

A nomadic empire of the Huns that dominated the steppe north of the Danube and Black Sea, reaching its peak under Attila. It fragmented quickly after his death in 453.

On its lands while it lasted

Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
Attila (c. 406 CE – 453 CE): Ruler of the Huns who led devastating invasions of the Eastern and Western Roman Empires from his base on the Hungarian plain.
Lyon (c. 443 CE): Capital of Burgundian Kingdom (443–534).
Theodoric the Great (454 CE – 526 CE): Ostrogothic king who ruled Italy from Ravenna, preserving Roman administration and culture.
Clovis I (c. 466 CE – 511 CE): King who united the Franks, converted to Catholic Christianity and made Paris his capital.
Fall of the Western Roman Empire (476 CE): The Germanic general Odoacer deposed Romulus Augustulus, the last Western Roman emperor, at Ravenna, a date conventionally marking the end of the Western Empire.
Soissons (c. 476 CE): Capital of Kingdom of Soissons (476–486), Kingdom of Neustria (724–731).
Tournai (c. 481 CE): Capital of Kingdom of the Franks (481–508).
Kyiv (482 CE): Capital of Kievan Rus' (882–1240), Principality of Kiev (1056–1240), Ukrainian People's Republic (1919–1919).
Pavia (c. 500 CE): Capital of Ostrogothic Kingdom (500–553).
Chufut-Kale (500–1490 CE): Capital of Crimean Khanate (1450–1490).
Ravenna mosaics (547 CE): In the apse of San Vitale in Ravenna the emperor Justinian and the empress Theodora stand with their courts in glittering glass and gold. They are the finest surviving mosaics of the early Byzantine age.
Basilica of San Vitale (547 CE): Church in Ravenna consecrated in 547, famous for its Byzantine mosaics of Justinian and Theodora.
Lucca (c. 577 CE): Capital of Duchy of Tuscia (577–586).
Devín (c. 623 CE): Capital of Samo's Empire (623–658).