Historical Events In 1123

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

Aug 29   On this day in history death of king Eystein I of Norway (b. ca. 1088)   

Dec 04   On this day in history death of omar Khayyám, Persian poet, astronomer, mathematician, and philosopher (b. 1048)