Events

• March 9 - Bulgarian tsar Ivan Asen II defeats Theodore of Epirus near the village of Klokotnitsa.
• Kingdom of Leon unites with the Kingdom of Castile.
• Approximate year of creation for the Carmina Burana poetry and song collection.

Births

• Eudes of Burgundy (died 1266)

Deaths

• May 2 - William de Braose, Lord of Abergavenny (hanged)
• July 28 - Duke Leopold VI of Austria (born 1176)
• September 23 - Alfonso IX of Leon (born 1171)
• October 25 - Gilbert de Clare, 5th Earl of Hertford, English soldier (born 1180)
• December 15 - Otakar I of Bohemia
• December 23 - Berengaria of Navarre, queen of Richard I of England

1230

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