Answer :

Final answer:

Diocletian divided the Roman Empire into two halves, and Constantine later brought it back together, relocating the capital.


Explanation:

Diocletian split the Roman Empire into two halves during the third through fifth centuries. He implemented the Tetrarchy, dividing the empire between four rulers and creating east and west halves. After Diocletian's reign, Emperor Constantine emerged as the sole ruler, reunifying the empire and shifting the capital to Byzantium.


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