Social Sciences and History / Unit 3 SSH 0226 short lesson, about 20 seconds
The Third-Century Crisis, Diocletian, Constantine
Captions available
The idea
From two thirty-five to two eighty-four CE, twenty-six emperors reigned and one died naturally, while the Sasanians revived Persia. Diocletian divided rule into the Tetrarchy. Constantine, after a vision before his battle of three twelve, became the first Christian emperor.
In practice
Constantinople founded as a new capital.
Where people slip
The anchor prints two dates for the Sasanian takeover; the course gives the century only.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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