# Constantine IV - Eastern Roman Emperor

URL: https://roman-history.com/rulers/constantine-iv
Reign: 668 – 685 CE
Dynasty: heraclian
Wikipedia: https://en.wikipedia.org/wiki/Constantine_IV

Defended Constantinople and restored religious unity.

## Succession
- Preceded by: [Constans II](https://roman-history.com/rulers/constans-ii)
- Succeeded by: [Justinian II](https://roman-history.com/rulers/justinian-ii-685)

## Timeline events during this reign
- 674 - [First Arab Siege of Constantinople](https://roman-history.com/timeline/674-first-arab-siege-of-constantinople)