Episode123- The TertrarchyThe History of Rome · Jan 24, 2011 · 23 minPlay · 23:23SaveShareEpisode pageIn 293 AD Diocletian and Maximian invited Constantius and Galerius to share in their Imperial burdens, forming what we today call the Tetrarchy.Related27:13The Longest Year in Human History (46 B.C.E.)Historia Civilis7.4M views • 7 years ago