The main part of the Cathedral of Notre Dame was completed in 1250 C.E.
Explanation:
Time related terms are what we call when we start the new timeframe for modern times, in the past there was an unspoken agreement on calling it Before Christian and Anno domini, now the correct terms to not mention Christianity and not hold the rest of the non-christian world to Christian timelines, the new terms are Before Common Era and Common Era, and the initials go after the year, so the only one that uses the correct terminology and in the right way is:
The main part of the Cathedral of Notre Dame was completed in 1250 C.E.
The Kingdom of Abyssinia was founded in the 13th century CE and, transforming itself into the Ethiopian Empire via a series of military conquests, lasted until the 20th century CE
