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.
end or era
20
end or era
Renaissance
Pop Art in the Modernism era.
The initals CE generally mean Common Era in historical terms. I am not sure what you intend for their meaning in an import.
The Greek heroes in Elizabethan tragedies were from the historical era. In the Greek tragedies they were from the pre-historical era.
The reform era.