Year 1072 (MLXXII) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire June 29 – Romanos IV (Diogenes), deposed emperor of the Byzantine Empire, is blinded and sent into exile to the island of Proti (in the Sea of Marmara) at the Monastery of Transfiguration. A few days before his death, he receives a letter from Michael Psellos (his political advisor), congratulating him on the loss of his eyes. Europe January 10 – The Normans under Robert Guiscard and his brother Roger I (Boso) conquer Palermo (after a one year siege). Roger receives the keys of the city, and Robert invests him with the title of Count of Sicily. The Emirate of Sicily rules only the southern part of the island, with Syracuse as the capital (until 1091). January – Battle of Golpejera: King Sancho II (the Strong) defeats the Castilian forces of his brother Alfonso VI (the Brave) near Carrión de los Condes. Alfonso is captured, but released into exile, where he seeks refuge in the Taifa of Toledo (under the protection of his vassal, Emir Al-Mamun). October 7 – Alfonso VI becomes king of León and Castile, following the assassination of Sancho II. He is bestowed with the title of "Emperor of Spain", and is forced by Rodrigo Diaz de Vivar (El Cid), the standard-bearer of Sancho, to take an oath denying any involvement in his brother's death. England May 27 – The Accord of Winchester establishes the primacy of the Archbishop of Canterbury over the Archbishop of York, in the Church of England. King William I (the Conqueror) invades Scotland and receives the submission of King Malcolm III. He agrees to sign the Treaty of Abernethy. Seljuk Empire December 15 – Sultan Alp Arslan (Heroic Lion) dies after a 9-year reign (during his campaign in Transoxiana). He is succeeded by his 17-year-old son Malik-Shah I, who is declared new ruler of the Seljuk Empire. Qavurt, a brother of Alp Arslan, claims the Seljuk throne for himself and occupies the capital of Isfahan. China Shen Kuo, Chinese polymathic scientist and statesman, is appointed as the head official for the Bureau of Astronomy – where he begins his work with the colleague Wei Pu on accurately plotting the orbital paths of the stars, planets, and moon three times a night, for a continuum of five years.