Diocletian who introduced the principle of the rule of tetrarchy ruled in 284-305 CE. He remained in charge until he was confident enough to abdicate; then he ordered his aide Maximian to do likewise. Diocletian began the life of an ordinary citizen. For seven years he lived in his magnificent palace in Split (Croatia).
Once he was retired he was engaged in growing cabbage, the size of which was extremely proud.
Aleksander Krawczuk, Poczet cesarzy rzymskich
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