- 843 the grandchildren of Karl of theLarge one (Ludwig the German, Karl the bald one and Lothar I.) divide its realm in the contract of Verdun .
- 845 the Wikinger plündern Paris and destroys Hammaburg (Hamburg); Bremen becomes thereupon seat of the ore diocese Hamburg.
- 847 Leo IV. fastens the Leostadt (the vatikanische quarter)
- Regino of Prüm, German monk and writer