It defines years when something of significance happened.
The Middle Era.
The Elizabethan era.
Era
The historical era for the Watson's go to Birmingham is back during racial issues.
The transition to the historical era is marked by the advent of writing systems, which enabled civilizations to record events and communicate over time. Writing helped in the development of written records, historical accounts, and complex societies, distinguishing it from the prehistoric era where there were no written records.
end or era
The initals CE generally mean Common Era in historical terms. I am not sure what you intend for their meaning in an import.
Pop Art in the Modernism era.
end or era
Renaissance
20
The 2nd century is the period from 101 to 200 in accordance with the Julian calendar in the Christian/Common Era. It is considered part of the Classical era, epoch, or historical period . so whatever you are talking about is after this time.wikipedia.com