|Covid-19|Sunset Crater Volcano (present-day Arizona) first erupts.
The Seljuk Turks storm Anatolia, taking Caesarea and Ani, marking the beginning of Turkish incursions into Anatolia.
The Kingdom of Georgia takes over Samshvilde, the capital of the neighboring Kingdom of Tashir-Dzoraget.
June 9 – Coimbra is taken by King Ferdinand of Castile.
European warriors go to Spain, to participate in the siege of Barbastro. This expedition is sanctioned by the Pope, and is now regarded as an early form of Crusade.
Harold Godwinson is shipwrecked at Ponthieu, Normandy and taken captive by Count Guy.
Construction of the Duomo at Pisa in Tuscany begins.
Duke Borivoj II of Bohemia
Robert Fitz Richard, a Norman landowner in England
King Niels of Denmark
Abu Muhammad 'Ali ibn Ahmad ibn Sa`id (Ibn Hazm), Andalusian poet, polymath, historian, philsopher, jurist and theologian
Dromtönpa, initiator of the Kadampa school and founder of Reting Monastery
Ottokar I of Styria
Rabbi Yaakov ben Yakar, German Talmudist
Yi Yuanji, Chinese Northern Song painter famous for his realistic paintings of animals (b. 1000)
Akkadevi, Indian princess, governor and general (b. 1010)
Year 1064 (MLXIV) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.