# Justin Martyr's First Apology (c. 155)

URL: https://christianity-history.com/timeline/155-justin-martyr-s-first-apology
Location: Rome
Themes: Theology

The philosopher Justin writes a defence of Christianity addressed to Emperor Antoninus Pius, including a description of Sunday worship. At this point in the timeline (c. 155), the Bishop of Rome was Pope Anicetus (c. 155 – 166/7). Dates for the earliest bishops of Rome are traditional and uncertain.

## Why it matters
Justin Martyr's First Apology mattered because it shaped how Christians understand God, Christ, salvation and the church.

Pope at the time: [Pope Anicetus](https://christianity-history.com/popes/pope-anicetus)

## Sources
- [Wikipedia — Justin Martyr](https://en.wikipedia.org/wiki/Justin_Martyr)
- [Encyclopaedia Britannica topic lookup — Justin Martyr's First Apology](https://www.britannica.com/search?query=Justin+Martyr%27s+First+Apology)
- [Wikipedia — Early Church (period overview)](https://en.wikipedia.org/wiki/Ante-Nicene_period)