Late antiquity is the hinge from Rome to the Middle Ages
Historians carve a cultural era roughly 250–750 CE across the Mediterranean and Near East—not a sudden dark fall, but a remaking. German Spätantike, popularized by Alois Riegl, entered English partly through Peter Brown’s 1971 World of Late Antiquity, which rejected Gibbon’s tale of pure decay.
Nobody agrees exactly when the era began or ended, but the reorganised empire of Diocletian, who reigned 284 to 305 and split power among four co-emperors, is a common starting point. Persia's new Sasanian rulers fought Rome for centuries along the eastern frontier. Constantine the Great, whose conversion in 312 is reported by his admirer Eusebius though its sincerity is debated, legalised Christianity with the Edict of Milan in 313, convened the council of bishops at Nicaea in 325 and funded the Church of the Holy Sepulchre. By the late 4th century Theodosius I had made it the empire's religion.
Migrating Germanic, Hunnic and Slavic peoples then shook the West. Visigoths sacked Rome in 410 and Vandals in 455, and by 476 the western empire had given way to barbarian kingdoms. In the East, Justinian's wars won back Italy and North Africa, although the Lombards soon took most of Italy. The mid-6th century brought the volcanic winter of 535–536, a cold spell called the Late Antique Little Ice Age, and the Plague of Justinian in 541.
Religion changed shape as much as politics. Christian monasticism was born in the 3rd century and by the 8th had become central to Christian life. Neoplatonism, Gnosticism and Hermeticism flourished, Manichaeism spread from Mesopotamia in both directions, and Mahayana Buddhism grew along the Silk Road. The bound parchment codex replaced the fragile scroll, making texts easier to carry and consult.
The exhausting Byzantine–Sasanian war of 602–628 cleared ground for Islam, whose armies destroyed the Sasanian state and took North Africa and Visigothic Spain before Charles Martel halted them at Tours. Renaissance writers saw a population and technology slump as a Dark Age, a label historians now use sparingly.
Source: Late antiquity
