April 14 – Mieszko I, first duke and prince of Poland, is baptized a Christian, which is usually considered the foundation of the Polish state. Mieszko's baptism, under the influence of his wife Dobrawa, brings his territories into the community of Christian countries. The lands ruled by Mieszko cover about 250,000 km², and are inhabited by about 1,2 million people around this time.[2]
Fall – Otto I departs for a third expedition in Italy and fights in Lombardy against the partisans under Adalbert II of Ivrea. In November an imperial counter-coup in Rome takes control of Castel Sant'Angelo.
Winter – Otto I enters Rome and has the twelve principal militia leaders (the Decarcones) hanged. Other plotters of the coup are either executed or blinded. Otto is declared 'liberator of the Church'.
February 9 – Ono no Michikaze (Ono no Tōfū), Japanese calligrapher, dies after having established the foundations of the 'Waystyle' of calligraphy while serving the imperial court at Heian-kyō (modern-day Kyoto).
^Jim Bradbury (2007). The Capetians: Kings of France, 987–1328, p. 42 (London: Hambledon Continuum).
^Richard Brzezinski (1998). History of Poland: Old Poland, King Mieszko I, p. 15. ISBN83-7212-019-6.
^Bóna, Istvá (2000). The Hungarians and Europe in the 9th-10th centuries. Budapest: Historia - MTA Történettudományi Intézete, p. 34. ISBN963-8312-67-X.
^Steven Runciman (1987). A History of the Crusades, Vol. 1. The First Crusade, p. 30 (Cambridge University Press).
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