Ptolemy's Almagest
Claudius Ptolemy completes the Almagest, setting out a geocentric model of the cosmos that remains the standard work of astronomy for over a millennium.
Claudius Ptolemy completes the Almagest, setting out a geocentric model of the cosmos that remains the standard work of astronomy for over a millennium.
The death of the philosopher-emperor Marcus Aurelius is often regarded as marking the end of the Pax Romana.
A peasant uprising led by Zhang Jiao shakes the Eastern Han and paves the way for an era of rival warlords.
A revolt against Han rule in Rinan commandery founds the kingdom of Linyi, the precursor of Champa in central Vietnam.
Allied forces of Sun Quan and Liu Bei defeat Cao Cao's army on the Yangtze, preventing him from conquering the south.
After the fall of the Han, China splits into the states of Wei, Shu and Wu until reunification under the Jin in 280.
Ardashir I defeats the last Parthian king, founding the Sasanian Empire, the last Iranian empire before the rise of Islam.
The Roman Empire nearly collapses under civil wars, invasions, plague and economic crisis until Diocletian's accession.
Triệu Thị Trinh leads an uprising against Eastern Wu rule in Jiuzhen.
Maya city-states such as Tikal, Palenque and Calakmul reach their height in architecture, writing, astronomy and calendrics.
The Soninke Ghana Empire (Wagadu) flourished in what is now Mauritania and Mali, growing rich from control of the trans-Saharan gold and salt trade.
Constantine defeats Maxentius near Rome; according to tradition he saw a Christian sign before the battle.
Emperors Constantine and Licinius agree on religious toleration, ending the persecution of Christians in the Roman Empire.
Chandragupta I takes the throne, beginning the Gupta era, often regarded as a golden age of Indian science, art and literature.
The first ecumenical council of Christianity, convened by Constantine, condemns Arianism and formulates the Nicene Creed.
King Ezana of Aksum, in present-day Ethiopia and Eritrea, adopted Christianity under the influence of Frumentius, making Aksum one of the first Christian states.
Emperor Constantine I dedicates Constantinople as the new capital of the Roman Empire.
The Nubian Kingdom of Kush, whose capital Meroë was famed for ironworking and pyramids, came to an end around the mid-4th century amid campaigns by Aksum.
The Goths, many of whom had crossed the Danube fleeing the Huns, crush a Roman army and kill Emperor Valens.
Emperor Theodosius I proclaims Nicene Christianity the state religion of the Roman Empire.
After the death of Theodosius I, the empire is divided between his two sons into Western and Eastern halves, never to be reunited.
Visigoths under Alaric I enter and sack Rome, the first time in about 800 years the city had fallen to a foreign enemy.
The mathematician and philosopher Hypatia is murdered by a mob in Alexandria.
Under the Guptas, the monastery of Nalanda in Bihar is founded and becomes Asia's foremost centre of Buddhist learning for centuries.
A Roman and Visigothic coalition under Aetius halts the invasion of Gaul by Attila and the Huns.
Odoacer deposes Romulus Augustulus, the last Western Roman emperor, a conventional end of antiquity in Europe.
Clovis I, unifier of the Franks, converts to Catholic Christianity; traditionally dated to around 496 at Reims.
Mathematician-astronomer Aryabhata completes the Aryabhatiya, treating place-value notation, an approximation of pi and the Earth's rotation.
Emperor Justinian I has Roman law codified as the Corpus Juris Civilis, the foundation of many modern civil-law systems.
The Hagia Sophia, rebuilt by Justinian I in Constantinople, is consecrated, crowned by a dome unprecedented in its time.
By tradition, a king of Baekje sends Buddhist images and scriptures to the Yamato court, beginning Buddhism's spread in Japan.
The first recorded pandemic of bubonic plague sweeps the Mediterranean, devastating the Byzantine Empire and killing vast numbers.
After expelling the Liang, Lý Bí proclaims himself Emperor Lý Nam Đế of the state of Vạn Xuân.
Emperor Wen of Sui conquers the southern Chen dynasty, ending nearly three centuries of division.
A moral and political code attributed to Prince Shōtoku, drawing on Confucian and Buddhist ideals of government.
Emperor Yang of Sui links and extends canals into the Grand Canal, joining the Yellow River and Yangtze basins.
According to Islamic tradition, Muhammad receives his first revelation in the cave of Hira near Mecca, beginning his prophetic mission.
Li Yuan (Emperor Gaozu) takes the throne at Chang'an, opening one of the most prosperous dynasties in Chinese history.
The Prophet Muhammad and his followers migrate from Mecca to Medina; the year becomes the start of the Islamic calendar.
Li Shimin kills two rival brothers and soon takes the throne as Emperor Taizong, whose reign is remembered as a golden age.
In the Brāhmasphuṭasiddhānta, the Indian mathematician Brahmagupta gives the first known rules for arithmetic with zero and negative numbers.
The monk Xuanzang travels to India and brings back hundreds of Buddhist texts, which he translates into Chinese.
Muhammad and his followers enter Mecca almost without bloodshed, making it the centre of Islam.
After Muhammad dies in Medina, Abu Bakr is chosen as the first caliph, beginning the Rashidun Caliphate.
Rashidun forces defeat the Sasanian army in Iraq, opening the way to the capture of the capital Ctesiphon.
Rashidun Muslim forces defeat the Byzantine army, opening the way to the conquest of Syria and the Levant.
Rashidun forces under Amr ibn al-As take Egypt from the Byzantines and found the city of Fustat.
The Japanese court launches reforms modelled on Tang China, centralising power around the emperor.
The last Sasanian king, Yazdegerd III, is killed, completing the Arab Muslim conquest of Persia.
Muawiya I establishes the Umayyad dynasty with its capital at Damascus, making the caliphate hereditary.