AI overview
I don't have enough context to write an accurate overview of "690." You've indicated it's a year, but without additional information about what happened, what was significant, or what field this relates to (history, astronomy, etc.), I cannot provide a factual 2-sentence explanation. Could you provide more context about what "690" refers to?
AI-generated from the Wikipedia summary — may contain errors.
Article
Anglo-Saxon kingdoms in Britain (7th century) Empress Wu Zetian (c. 625–705)
Year 690 (DCXC) was a common year starting on Saturday of the Julian calendar. The denomination 690 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.