Each lasted perhaps for four or five more thousand years, more than double the time from the Christian Era to our own day.
When I was in college, the professors used to laugh at me for forgetting the date of the Christian Era.
They ceased to be worked in the second century of the Christian Era.
The earliest paper appears to have been made in China at a date even before the Christian Era.
By the beginning of the Christian Era all that remained of the culture of the old world was gathered in Rome.
Silk is a Chinese discovery and was used as a material for clothes for many thousands of years before the Christian Era.
Japan had no written language of any kind until it received one from China about the sixth century of the Christian Era.
The making of stained-glass windows is one of the arts which belong wholly to the Christian Era.
Pliny mentions twenty-nine kinds of apples cultivated in Italy, about the commencement of the Christian Era.
Glass was not used for the admission of light into the apartments until towards the fifth century of the Christian Era.