Editing 1123 (section)

==== January–March ====
* [[January 29]] – [[List of prince-archbishops, archbishops, bishops and administrators of Bremen|Frederick I, Archbishop of Bremen]] since 1104, dies after a reign of more than 18 years, and is succeeded by Adalbert II.
* [[February 25]] – [[Japan]]'s [[Emperor Toba]] abdicates in favor of his 3-year-old son [[Emperor Sutoku|Sutoku]] after a 16-year reign. The retired [[Emperor Shirakawa]] rules as [[regent]] during Toba's minority.
* [[March 18]] –
**The [[First Council of the Lateran]] convenes in [[Rome]]; it confirms the 1122 [[Concordat of Worms]] and demands [[Clerical celibacy (Catholic Church)|clerical celibacy]] in the [[Catholic Church]].
**The coronation of Japan's Emperor Sutoku takes place.
* [[March 25]] – [[St Bartholomew's Hospital|St Bartholomew’s Hospital]] in London, commonly known as Barts, is founded by [[Rahere]], a favourite courtier of [[Henry I of England|King Henry I]]; it is now the oldest hospital in the United Kingdom operating on its original site.<ref>{{Cite web |title=St Bartholomew's Hospital: Our history |url=https://www.bartshealth.nhs.uk/st-bartholomews-our-history |access-date=2023-03-17 |website=www.bartshealth.nhs.uk}}</ref>