1106

By place

Europe

• Spring - Bohemond I, prince of Antioch, marries Constance of France in the cathedral of Chartres. Philip agrees to marry his second daughter, the 9-year-old Cecile of France, to Tancred. Meanwhile, Bohemond mobilises an expeditionary force to begin a campaign against Emperor Alexios I.
• August 7 - Emperor Henry IV escapes his captors at Ingelheim. He enters into negotiations at Cologne with English, French and Danish noblemen, and begins to collect an army to oppose his son Henry V but dies at Liège after a 49-year reign. Henry leads an successful expedition against Count Robert II of Flanders and is forced to swear his allegiance to him.
• September 28 - Battle of Tinchebray: King Henry I defeats and imprisons his older brother Robert II, duke of Normandy, in Devizes Castle. Edgar Atheling and the 3-year-old William Clito, son of Robert, are also taken prisoner. Henry places his nephew William in the custody of Helias of Saint-Saens, count of Arques.
• Autumn - Bohemond I returns to Apulia with an expeditionary force to prepare an offensive against the Byzantines. He is accompanied by his newlywed wife Constance and followers.
• Sultan Yusuf ibn Tashfin dies after a 45-year reign. He is succeeded by his 22-year-old son Ali ibn Yusuf as ruler of the Almoravid Empire. Ali appoints his brother Tamin ibn Yusuf as governor of Al-Andalus.
• Bolesław III, duke of Poland, begins a civil war against his half-brother Zbigniew, for control over Lesser Poland and Silesia.
• The city of Balaguer is conquered from the Moors by Ermengol VI, count of Urgell.

  England

• Roger le Poer, bishop of Salisbury, is granted land in south Wales by Henry I. He starts the construction of Kidwelly Castle on the banks of the river Gwendraeth.
• Magnus Erlendsson becomes Earl of Orkney.

  By topic

Astronomy

• February 2 - A comet is seen and reported by several civilisations around the world. Lasting for 40 days, the comet grows steadily in brightness until finally fading away.