Historical Events In 1123

Mar 18   1st Latern Council (9th ecumenical council) opens in Rome in the year 1123.  

Aug 29   In the year 1123 death of king Eystein I of Norway (b. ca. 1088)  

Dec 04   In the year 1123 death of omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (b. 1048)