The first century AD.
It is in the first century BC, which is different to the first century AD.
1st century AD
It is the first century AD.
The 1st century AD.
It is the 18th century AD.
It is the second century AD.
The 1st century AD.
The 1st century AD.
The first century AD.
The 3rd Century AD.
It is the first century AD.
seventeenth century