The 540s decade ran from January 1, 540, to December 31, 549.
The 550s decade ran from January 1, 550, to December 31, 559.
Year 540 (DXL) was a leap year starting on Sunday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Iustinus without colleague. The denomination 540 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 550 (DL) was a common year starting on Saturday of the Julian calendar. The denomination 550 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 552 (DLII) was a leap year starting on Monday of the Julian calendar. The denomination 552 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 542 (DXLII) was a common year starting on Wednesday of the Julian calendar. From this year forward, the appointment of particular Roman consuls was abandoned and the office was merged with that of Byzantine emperor. Thus, the consular year dating was abandoned in practice, even though it formally remained until the end of the 9th century. The denomination 542 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 544 (DXLIV) was a leap year starting on Friday of the Julian calendar. The denomination 544 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 549 (DXLIX) was a common year starting on Friday of the Julian calendar. The denomination 549 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 556 (DLVI) was a leap year starting on Saturday of the Julian calendar. The denomination 556 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Totila, original name Baduila, was the penultimate King of the Ostrogoths, reigning from 541 to 552 AD. A skilled military and political leader, Totila reversed the tide of the Gothic War, recovering by 543 almost all the territories in Italy that the Eastern Roman Empire had captured from his Kingdom in 540.
Ildibad was a king of the Ostrogothic Kingdom in AD 540–541.
The Lazic War, also known as the Colchidian War or in Georgian historiography as the Great War of Egrisi, was fought between the Byzantine Empire and the Sasanian Empire for control of the ancient Georgian region of Lazica. The Lazic War lasted for twenty years, from 541 to 562, and ended with the Fifty-Year Peace Treaty, which obligated the Byzantine Empire to pay tribute to Persia each year for the recognition of Lazica as a Byzantine vassal state by Persians. The Lazic War is narrated in detail in the works of Procopius and Agathias.
The Gothic War between the Byzantine Empire during the reign of Emperor Justinian I and the Ostrogothic Kingdom of Italy took place from 535 to 554 in the Italian Peninsula, Dalmatia, Sardinia, Sicily, and Corsica. It was one of the last of the many Gothic Wars against the Roman Empire. The war had its roots in the ambition of the Byzantine emperor Justinian I to recover the provinces of the former Western Roman Empire, which the Romans had lost to invading barbarian tribes in the previous century, during the Migration Period.
Anicius Faustus Albinus Basilius was a high official of the Eastern Roman Empire and the last ordinary consul of Roman history, holding the office alone in 541.
Flavius Mar. Petrus Theodorus Valentinus Rusticius Boraides Germanus Iustinus, simply and commonly known as Justin, was an Eastern Roman aristocrat and general. A member of the Justinian Dynasty and nephew of Emperor Justinian I, he was appointed as one of the last Roman consuls in 540, before going on to assume senior military commands in the Balkans and in Lazica. He fought against the Slavs, the Sassanid Persians and supervised the Byzantine Empire's first contacts with the Avars. At the time of Justinian's death, he was seen as a probable successor, but was beaten to the throne by his cousin, Justin II, who exiled him to Egypt, where he was murdered.
Gubazes II was king of Lazica from circa 541 until his assassination in 555. He was one of the central personalities of the Lazic War (541–562). He originally ascended the throne as a vassal of the Byzantine Empire, but the heavy-handed actions of the Byzantine authorities led him to seek the assistance of Byzantium's main rival, Sassanid Persia. The Byzantines were evicted from Lazica with the aid of a Persian army in 541, but the Persian occupation of the country turned out to be worse, and by 548, Gubazes was requesting assistance from Byzantium. Gubazes remained a Byzantine ally during the next few years, as the two empires fought for control of Lazica, with the fortress of Petra as the focal point of the struggle. Gubazes eventually quarrelled with the Byzantine generals over the fruitless continuation of the war, and was assassinated by them.
Aligern or Aligernus was an Ostrogoth military leader, active in the Gothic War (535-554). By the end of the war, Aligern had joined the Byzantine army. The main sources about him are Procopius and Agathias.
Rufius Petronius Nicomachus Cethegus was a politician of Ostrogothic Italy and the Eastern Roman Empire. He was appointed consul for 504 AD, and held the post without a colleague. His father was Petronius Probinus, the consul for 489 and prominent supporter of Antipope Laurentius.
Bessas was an Eastern Roman general of Gothic origin from Thrace, primarily known for his career in the wars of Justinian I. He distinguished himself against the Sassanid Persians in the Iberian War and under the command of Belisarius in the Gothic War, but after Belisarius' departure from Italy he failed to confront the resurgent Goths and was largely responsible for the loss of Rome in 546. Returning east in disgrace, despite his advanced age he was appointed as commander in the Lazic War. There he redeemed himself with the recapture of Petra, but his subsequent idleness led Justinian to dismiss him and exile him to Abasgia.
