AI overview
I don't have enough context to write an accurate overview. You've only provided "691" and "year" as context, but this could refer to many different historical events, mathematical concepts, or other topics from the year 691. Could you provide more details about what "691" refers to?
AI-generated from the Wikipedia summary — may contain errors.
Article
King Clovis IV and Pepin of Herstal
Year 691 (DCXCI) was a common year starting on Sunday of the Julian calendar. The denomination 691 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.