The first century.
The first century AD
The sixth century AD covers the years from 501 AD to 600 AD.
Any year between 1501 AD and 1600 AD - including 1537 - is in the sixteenth century.
The year 10AD occurred during the first century.
The first century spans from the year 1 to the year 100. It begins with the year 1 AD, immediately following the year 1 BC, and concludes at the end of the year 100 AD. This century is part of the Anno Domini (AD) system used to number years in the Gregorian calendar.
The first century AD
This is a year in the 13th century AD.
The 2nd century AD.
The year 17 AD falls within the 1st century AD. The 1st century spans from the year 1 to the year 100. Therefore, 17 AD is part of this century.
The year 705 AD is in the 7th century.
4 AD is in the 1st century. The 1st century spans from the year 1 AD to the year 100 AD. Therefore, 4 AD falls within this timeframe.
The sixth century AD covers the years from 501 AD to 600 AD.
1150 AD is in the 12th century.
He was born sometime early in the 1st century AD. The actual date is not known,
AD 43 falls within the 1st century. The 1st century spans from the year 1 to the year 100. Therefore, AD 43 is in the early part of this century.
Both. It was the last year of the 21st century BC, and the first year of the 21st century AD.
1000 AD