Tetrarchy: Did you mean...?

The Western Roman Empire is the modern-day term for the western half of the Roman Empire after it was divided in two by the emperor Diocletian (r. 284-305 CE) in c. 285/286 CE. The Romans themselves did not use this term. At its height (c...

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 of Gaius...

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 build...

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 Syria and...

This infographic presents the timeline of Roman emperors from Augustus to Diocletian, covering nearly three centuries of imperial rule. It traces the transformation of Rome from republic to empire, through stability, crisis, and reform, ending...

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 of the Holy...

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 death...

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 decades...

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, all of these empires fell...

The Julio-Claudian Dynasty Augustus 16 Jan 27 BCE - 19 Aug 14 CE Tiberius 18 Sep 14 CE - 16 Mar 37 CE Caligula 18 Mar 37 CE - 24 Jan 41 CE Claudius 25 Jan 41 CE - 13 Oct 54 CE Nero 13 Oct 54 CE - 11 Jun 68 CE Galba 8 Jun 68 CE -...