Tetrarchy: Did you mean...?

The ancient city of Byzantium was founded by Greek colonists from Megara around 657 BCE. According to the historian Tacitus, it was built on the European side of the Strait of Bosporus on the order of the “god of Delphi” who said to...

The rich lands of Egypt became the property of Rome after the death of Cleopatra VII in 30 BCE, which spelled the end of the Ptolemaic dynasty that had ruled Egypt since the death of Alexander the Great in 323 BCE. After the murder...

Saint Helena of Constantinople (248/250-328 CE) was the mother of Roman emperor Constantine I (r. 306-337 CE). She famously made a pilgrimage to Jerusalem where tradition claims found Christ's true cross and built the Basilica...

Britain was a significant addition to the ever-expanding Roman Empire. For decades, Rome had been conquering the Mediterranean Sea – defeating Carthage in the Punic Wars, overwhelming Macedon and Greece, and finally marching into...

The "barracks emperors" is a term coined by later historians referring to the Roman emperors who were chosen and supported by the army during the period known as the Crisis of the Third Century (also...

Gallienus was Roman emperor from 253 to 268 CE. Publius Licinius Egnatius Gallienus, the eldest son of Emperor Valerian, was named co-emperor by his father in 253 CE. He was one of many who would claim the throne over the next two...

Postumus was Roman emperor from 260 to 269 CE. Marcus Cassianus Latinius Postumus was a trusted military commander of Emperor Gallienus (253-268 CE) and governor or Germania Superior and Inferior (Upper and Lower Germany). After the...

Time has seen the rise and fall of a number of great empires - the Babylonian, the Assyrian, the Egyptian, and lastly, the Persian. Regardless of the size or skill of their army or the capabilities of their leaders...

The central pillars of Christianity originate from the story of the trial, crucifixion, and death of Jesus Christ. The events cover the time when Jesus of Nazareth and his followers entered Jerusalem for...

Galatia was the most long-lasting and powerful Celtic settlement outside of Europe. It was the only kingdom of note to be forged during the Celtic invasions of the Mediterranean in the 4th and 3rd centuries...