40Centuries: 1st century BC - 1st century - 2nd century
- Christianity comes to Egypt as a church is founded in Alexandria. Mark the Evangelist founds the Coptic Orthodox Church as the first pope.
- Caligula embarks on a campaign to conquer Britain.
- German tribe Quadi begin settling in today Moravia and Slovakia.
- Noricum is incorporated into the Roman Empire.
- The Sanhedrin court ceases to function.
- Pedanius Dioscorides, Greek physician
- Frontinus, Roman soldier and author
- Dio Chrysostom, Greek philosopher and historian
For the number 40, see forty.