984

By place

Europe

• Spring - German boy-king Otto III, Holy [Roman Emperor|Otto III] is seized by the deposed Henry II, Duke of Bavaria, who has recovered his duchy and claims the regency as a member of the Ottonian Dynasty. But Henry is forced to hand over Otto to his mother, empress consort Theophanu.
• King Ramiro III of León loses his throne to Bermudo II, who also becomes ruler of the entire Kingdom of León.

Japan

• Fall - Emperor En'yū abdicates the throne in favor of his 16-year-old son Kazan after a 15-year reign. En'yū retires and becomes a Buddhist priest.

By topic

Technology

• Qiao Weiyue, a Chinese engineer, innovates the first known use of the double-gated canal pound lock during the Song dynasty, for adjusting different water levels in segments of the Grand Canal in China.

Religion

• August 20 - Pope John XIV dies a prisoner in the Castel Sant'Angelo at Rome after a 1-year reign, having either been murdered or starved to death.
• Anti-Pope Boniface VII returns from Constantinople and gains support from the powerful Roman Crescentii family. He takes hold of the papal throne.

Births

• Abu al-Qasim Muhammad ibn Abbad, founder of the Abbadid dynasty
• Choe Chung, Korean Confucian scholar and poet
• Emma of Normandy, noblewoman, queen consort of England, Denmark and Norway

Deaths

• July 7 - Crescentius the Elder, Roman politician and aristocrat
• July 18 - Dietrich I, bishop of Metz
• August 1 - Æthelwold, bishop of Winchester
• August 20 - John XIV, pope of the Catholic Church
• September 9 - Warin, archbishop of Cologne
• Buluggin ibn Ziri, ruler of the Zirid Dynasty
• Domnall Claen, king of Leinster
• Edith of Wilton, English princess and abbess
• Eochaid Ua Floinn, Irish poet
• Gerberga, Frankish queen
• Jordan, bishop of Poland
• Miró III, count of Cerdanya and Besalú
• Ragnhild Eriksdotter, Norse Viking noblewoman
• Shi Shouxin, Chinese general