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4
votes
1answer
77 views

When were Roman Emperor's faces placed on coins?

During an emperor's reign, were coins (i.e. sestertii) minted the year they became emperors, the year they stopped being emperors, or right in the middle?
8
votes
2answers
175 views

Roman navy propelled by animals instead of human rowers?

I have read one brief account of military planning around the time of Roman emperor Constantine the Great (272 – 337) whereby the Roman navy's rowers could have been substituted by animals (source ...
6
votes
1answer
112 views

Origin of Diocletian's tetrarchy

I have always been impressed by the elegance, symmetry (and relative modesty) of the tetrarchy founded by Roman emperor Diocletian (245 - 316). Is it something that was invented at the time or does ...