| Millennium: | 1st millennium |
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 810s 820s 830s – 840s – 850s 860s 870s |
| Years: | 840 841 842 843 844 845 846 847 848 849 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
Contents |