When was the CE/BCE timeline established?

by GenghisKhanPhD

Along with this, in our year 4 BCE, what year would that have been to the Romans at the time?

sunagainstgold

I have a couple of earlier answers that might interest you:

  • This one talks about the origins of the AD/CE system
  • This one talks about its gradual option by the later medieval West

I hope this is useful, and please let me know if there are any details I need to fill in. :)