The 21st century. Think of it this way. The 1st century is years 1-100. So that's 1. For the rest, simply take the first two digits in the year, in this case 20, and add one. So 20 + 1 = 21, the 21st century.
20th century
1866 was in the 19th century. 1966 was in the 20th century. 2066 will be in the 21st century.
Cosmos and Damian were twin brothers who were Christian martyrs. They were known for their healing abilities and were believed to have cured many people. In the 3rd century AD, they were persecuted for their faith and ultimately martyred.
The Aeolipile was invented by the ancient Greek inventor Heron of Alexandria in the 1st century AD. It is considered one of the earliest known steam-powered devices.
The geocentric theory was developed by ancient Greek philosophers, primarily by Ptolemy in the 2nd century AD. This theory posited that the Earth was the center of the universe around which all other celestial bodies revolved.
1st century AD
The 1st century AD.
It is the second century AD.
The first century AD.
It is the 18th century AD.
The 1st century AD.
It is the first century AD.
The 1st century AD.
The first century AD.
The 3rd Century AD.
It is the first century AD.
seventeenth century