1014

Year 1014 was a common year starting on Friday of the Julian calendar, the 1014th in topic the 1014th year of the Common Era and Anno Domini designations, the 14th year of the 2nd millennium, the 14th year of the 11th century, and the 5th year of the 1010s decade.

Events

Summer - Battle of Thessalonica: Emperor Basil II launches a raiding expedition against First [Bulgarian Empire|Bulgaria]. From Western Thrace via Serres he reaches the valley of the Strymon River, near Thessaloniki ; the local Byzantine governor Theophylact Botaneiates defeats the Bulgarians.
July 29 - Battle of Kleidion: Basil II defeats the Bulgarian forces, between the mountains of Belasitsa and Ograzhden, near the town of Kleidon. By order of Basil, almost 15,000 prisoners are blinded; Tsar Samuel survives the battle, but dies of shock. Basil earns the nickname "Bulgar-Slayer".

February 3 - King Sweyn Forkbeard dies at Gainsborough after a reign of five weeks. He is succeeded by Harald II who becomes king of Denmark, while Cnut is elected by the Vikings of the Danelaw as king of England.
March - King Æthelred the Unready sends ambassadors to England, including his own son Edward to negotiate to reclaim of the throne at the invitation of the English nobles.

April 23 - Battle of Clontarf: Brian Boru, High King of Ireland, defeats a Norse-Irish alliance, although himself killed.

Hammad ibn Buluggin adopts Sunni Islam and declares his independence from the Zirid dynasty. He recognizes the Abbasid Caliphate in Baghdad as being the rightful caliphs and becomes the first ruler of the Hammadid dynasty.

Emperor Sanjō of Japan has an eye illness. Influential statesman Fujiwara no Michinaga schemes to place his 6-year-old grandson Prince Atsuhira on the throne rather than the Emperor's son.
Rajendra Chola I, king of the Chola dynasty begins his reign.

The Nicene-Constantinopolitan Symbol of the Faith is used for the first time during the Roman Mass, after Henry II, the newly crowned Holy Roman Emperor, asks the Pope to add it – together with the filioque clause. Prior to this date, the Creed has not been used at all during the liturgy.
Wulfstan, archbishop of York in England, preaches his Latin homily Sermo Lupi ad Anglos, describing the Danes as "God's judgement on England".