The period from 800 to 899, almost synonymous with the 9th century (801–900).
The period from 800 to 809, known as the 800s decade, almost synonymous with the 81st decade (801-810).
Topics referred to by the same term
This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.