Note: Sometimes the '40s is used as shorthand for the 1940s, the 1840s, or other such decades in various centuries.

Events and trends

• The Roman emperor Caligula assassinated (41), succeeded by his uncle Claudius
• Roman conquest of Britain begins under Aulus Plautius, 43

Significant people

• Gaius Caesar Germanicus/Caligula, Roman Emperor (37 - 41).
• Claudius, Roman Emperor (41 - 54).
• Paul of Tarsus, Christian evangelist

40s

40er | 40te | Dècada del 40 | 40'erne | 40er | Años 40 | 40ko hamarkada | Années 40 | 40-49 | Anni 40 | 40-es évek | 40-49 | 40-årene | Década de 40 | Anii 40 | 40-е | Vitet 40 | 40s | 40. | 40-luku | 40-talet | 40. yıllar | 40年代