1054

Centuries: 10th century - 11th century - 12th century

Decades: 1000s 1010s 1020s 1030s 1040s - 1050s - 1060s 1070s 1080s 1090s 1100s

Years: 1049 1050 1051 1052 1053 - 1054 - 1055 1056 1057 1058 1059

• July 4 - A supernova is observed by the Chinese and Amerindians near the star ζ Tauri. For several months it remains bright enough to be seen during the day. Its remnants form the Crab Nebula.
• Pope Leo IX and Michael Cerularius, Partiarch of Constantinople, decree each other's excommunication, finalising the Great Schism between the Catholic and Orthodox Churches.
• Malcolm Canmore begins his campaign for the throne of Scotland

Births

Deaths

• Pope Leo IX