Constantine I, also known as Constantine the Great, was a Roman emperor from AD 306 to 337 and the first emperor to convert to Christianity. Born in Naissus, Dacia Mediterranea, he was the son of Flavius Constantius, a Roman army officer of Illyrian origin who had been one of the four rulers of the Tetrarchy. His mother, Helena, was a Greek woman of low birth and a Christian. Later canonised as a saint, she is traditionally credited for the conversion of her son. Constantine served with distinction under the Roman emperors Diocletian and Galerius. He began his career by campaigning in the eastern provinces before being recalled in the west to fight alongside his father in the province of Britannia. After his father's death in 306, Constantine was acclaimed as augustus (emperor) by his army at Eboracum. He eventually emerged victorious in the civil wars against emperors Maxentius and Licinius to become the sole ruler of the Roman Empire by 324.
Pope Miltiades, also known as Melchiades the African, was the bishop of Rome from 311 to his death on 10 or 11 January 314. It was during his pontificate that Emperor Constantine the Great issued the Edict of Milan (313), giving Christianity legal status within the Roman Empire. The pope also received the palace of Empress Fausta where the Lateran Palace, the papal seat and residence of the papal administration, would be built. At the Lateran Council, during the schism with the Church of Carthage, Miltiades condemned the rebaptism of apostatised bishops and priests, a teaching of Donatus Magnus.
The 300s decade ran from January 1, 300, to December 31, 309.
The 400s decade ran from January 1, 400, to December 31, 409.
The 310s decade ran from January 1, 310, to December 31, 319.
The 320s decade ran from January 1, 320, to December 31, 329.
Year 325 (CCCXXV) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Proculus and Paulinus. The denomination 325 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.
The 380s decade ran from January 1, 380, to December 31, 389.
Year 312 (CCCXII) was a leap year starting on Tuesday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Constantinus and Licinianus. The denomination 312 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 313 (CCCXIII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Licinianus. The denomination 313 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. This year is notable for ending of the persecution of Christians in the Roman Empire.
The 360s decade ran from January 1, 360, to December 31, 369.
The 330s decade ran from January 1, 330, to December 31, 339.
The 340s decade ran from January 1, 340, to December 31, 349.
Year 300 (CCC) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius. The denomination 300 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 380 (CCCLXXX) was a leap year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Augustus. The denomination 380 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 326 (CCCXXVI) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Constantinus. The denomination 326 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 306 (CCCVI) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius. The denomination 306 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 310 (CCCX) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Andronicus and Probus. The denomination 310 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 340 (CCCXL) was a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Acindynus and Valerius. The denomination 340 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 335 (CCCXXXV) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Albinus. The denomination 335 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.
