1057

Events

June 8 - General Isaac Komnenos proclaims himself emperor in Paphlagonia, and starts a civil war against Emperor Michael VI. He advances with a Byzantine expeditionary force towards Constantinople. At the same time, Michael sends an army against the rebels – western regiments and eastern ones – to stop him.
August 20 - Battle of Hades: Rebel forces under Isaac Komnenos defeat the Byzantines on the plains of Hades. General Katakalon Kekaumenos routs the imperial right flank, and reaches the enemy's camp. He destroys the tents and supplies, which leaves the way open to Constantinople.
September 1 - A riot in favor of Isaac Komnenos breaks out in Constantinople. Patriarch Michael I convinces Michael VI to abdicate the throne, and Isaac is crowned as emperor of the Byzantine Empire.
Europe
August 15 - Battle of Lumphanan: Macbeth, King of Scotland is killed by Malcolm. Macbeth is succeeded by his stepson Lulach, who is crowned as king of Scotland at Scone.
August - Battle of Varaville: Norman forces under William the Conqueror defeat a Franco-Angevin army at the mouth of the Dives. King Henry I of France on campaign in Normandy is forced to retreat his army.
King Ferdinand I of León takes the cities of Lamego and Viseu from Christian lords allied to the Muslim Taifa of Silves.
Africa
The Banu Hilal razes Kairouan. The Zirid dynasty has to re-settle to Mahdia.
Asia
King Anawrahta captures Thaton, the capital of the Thaton Kingdom, strengthening Theravada Buddhism in Burma.
By topic

July 28 - Pope Victor II dies after a 15-month pontificate at Arezzo. He is succeeded by Stephen IX as the 154th pope of the Catholic Church.