# Dionysius Exiguus introduces Anno Domini (525)

URL: https://christianity-history.com/timeline/525-dionysius-exiguus-introduces-anno-domini
Location: Rome
Themes: Culture

The monk Dionysius Exiguus devises the Anno Domini system while calculating Easter tables. At this point in the timeline (525), the Bishop of Rome was Pope John I (13 August 523 – 18 May 526).

## Why it matters
Dionysius Exiguus introduces Anno Domini mattered because it left a lasting mark on Christian culture, devotion and society.

Pope at the time: [Pope John I](https://christianity-history.com/popes/pope-john-i)

## Sources
- [Wikipedia — Dionysius Exiguus](https://en.wikipedia.org/wiki/Dionysius_Exiguus)
- [Encyclopaedia Britannica topic lookup — Dionysius Exiguus introduces Anno Domini](https://www.britannica.com/search?query=Dionysius+Exiguus+introduces+Anno+Domini)
- [Wikipedia — Age Of Councils (period overview)](https://en.wikipedia.org/wiki/First_seven_ecumenical_councils)