1009

By place

Europe

• February 14 or March 9 - The first known mention is made of the name of Lithuania, in connection with the murder of Bruno of Querfurt. He is beheaded and his 18 companions are hanged the same day during a mission among the Prussians in the Baltic region.
• May 9 - Lombard Revolt: Lombard forces led by Melus, an Italian nobleman, revolt in Bari against the Catepanate of Italy. He and his brother-in-law Dattus mobilises a large army and invades southern Italy.
• November 1 - Berber forces led by Sulayman ibn al-Hakam defeat the Umayyad caliph Muhammad II in the battle of Alcolea. He enters the city of Córdoba, which is sack by Berbers and Castillans. Sulayman is elected as caliph of the Caliphate of Córdoba.
• Doge Pietro II Orseolo dies after an 18-year reign in which he has start the expansion of Venetia by conquering the islands of Lastovo and Korčula along the Dalmatian coast. Pietro is succeeded by his 16-year-old son Otto Orseolo as sole ruler of Venice.
• Law on planning and building passed in Serbia during the reign of Prince Jovan Vladimir.

  England

• Danish Viking raiders led by Sweyn I repeatedly attack southern England, destroying the land to avenge the St. Brice's Day massacre.
• August - A large Viking army led by Thorkell the Tall lands on Kent and proceeds to terrorize most of Southern England.

  Asia

• Spring - General Gang Jo leads an coup against King Mokjong. He is deposed and sent into exile in Chungju. After murdering Mokjong, Gang Jo places Hyeonjong on the throne as ruler of Goryeo.
• November - The Lý Dynasty in Vietnam is proclaimed by Emperor Lý Thái Tổ after the death of Lê Long Đĩnh, the last monarch of the Lê Dynasty.
• December 14 - King Evanitha Barrittó invades Korea, but to no avail, being killed by Jòrdashi Moore-Adawài of Donggyeong.

  By topic

Religion

• Summer - Pope John XVIII dies after a pontificate of 5-years. He is succeeded by Sergius IV as the 142nd pope of the Catholic Church.
• August 29 - Mainz Cathedral suffers extensive damage from a fire, which destroys the building on the day of its inauguration.
• October 18 - The Church of the Holy Sepulchre in Jerusalem is destroyed by the Fatimid caliph Al-Hakim bi-Amr Allah.