bc
AD
The age of metal refers to the time period of 2000 BC - AD 300. The metal age refers to the bronze and iron ages.
1400 bc or ad
it must be BC , because later on birth of Jesus Christ (start of AD), the metals were discovered, and there were no stone age remaining on that time.
The birth of Christ.
There is not such a term as the golden age of Rome. The term is golden age of classical Latin literature. It span from 81 BC to 17 AD. Therefore most of this age, (81 BC to 27 BC) occurred during the Roman Republic, when Rome did not have an emperor. The period 27 BC to 14 AD was under the emperor Augustus. The period from 14 Ad to 17 AD was under the emperor Tiberius.
the iron age began in 1200 bc
It represents the time, so in about 2000 bc is the stone age, 500 bc is the bronze age, and 500 ad is the iron age
8,000 Bc
About 50 BC through 200 AD.
The last date of BC was 1 BC, then the first date of AD was 1 AD, there was no zero.