Roman emperor diocletian: Did you mean...?

This map illustrates the Roman Tetrarchy, a four-part imperial system established by Emperor Diocletian (reigned 284–305 CE) in 293 CE to stabilize and defend the sprawling Roman Empire. It aimed to address political instability, streamline...

Emperor Gaozu (also Kao-tsu, formerly Li Yuan, r. 618-626 CE) was a Sui military commander who led a rebellion against his former masters, seized control of the state, and founded the Tang Dynasty (618-906 CE). Overshadowed in the ancient...

The Holy Roman Empire officially lasted from 962 to 1806. It was one of Europe’s largest medieval and early modern states, but its power base was unstable and continually shifting. The Holy Roman Empire was not a unitary state, but a confederation...

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 Supreme August Jade Emperor is the supreme deity of Chinese tradition and is otherwise known as Yuhuang Shangdi (Yu-huang Shang-ti), Yudi (Yu Ti) or Mr. Heaven (Lao-t'ien ye). He governs the cosmos and resides in a magnificent palace...

Emperor Kammu (aka Kanmu) reigned in ancient Japan from 781 to 806 CE and is most noted for relocating the capital to Heiankyo (Kyoto) in 794 CE. Kammu was one of the most powerful emperors Japan had seen or would ever see, and his reign...

Constantine I, aka Constantine the Great, was Roman emperor from 306 to 337 CE. Realizing that the Roman Empire was too large for one man to adequately rule, Emperor Diocletian (284-305 CE) split the empire into two, creating a tetrachy or...

Batavian revolt was a rebellion of the Batavians against the Romans in 69-70 CE. After initial successes by their commander Julius Civilis, the Batavians were ultimately defeated by the Roman general Quintus Petillius Cerialis. The year...

The octagonal mausoleum of Diocletian (now Cathedral of St. Domnius) inside Diocletian's Palace, Split (Croatia). Diocletian's Palace was built between 293-303 CE in preparation for his retirement on 1 May 305 CE.

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...