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, [Holy Roman 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 a 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.

Britain

• 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.