User blog comment:Raylan13/Elder Scrolls Online Community Q&A/@comment-3076045-20140321065915/@comment-174.21.96.67-20140331054940

I haven't actually played the beta yet, but I do know that the 3rd Century is not synonymous with the 3rd Era. It is probably referring to the years 201-300, which could be either 1st or 2nd Era.