845
| Years: 841 842 843 844 – 845 – 846 847 848 849 | |
| Decades: 810s 820s 830s – 840s – 850s 860s 870s | |
| Centuries: 8th century – 9th century – 10th century | |
Events
- March 28 – Paris is sacked by Viking raiders, probably under Ragnar Lodbrok, who collect a huge ransom in exchange for leaving.
- Vikings also sack Hamburg and Melun.
Births
Deaths
- Michael I Rhangabes, Byzantine Emperor
- al-Khwarizmi, mathematician (approximate date)
Categories: 845