How many roman emperors ruled during the 50-year period chart?

Nineteen emperors ruled Rome from 235 C.E to 285 C.E

if that is the period you are talking about

Just think, why was it effective? -it appeled to critics because it was written well, that made it noticeable to the public including the white population-it was also recognizable to the african americans because it was about their heritage.-it was powerful just keep finding more points and elaborate on them. message me if you need more