1017

upright=1.35|thumb|Sculpture of [[Rajendra Chola I|Rajendra I (r. 1014–1044)]]

Year 1017 (MXVII) was a common year starting on Tuesday of the Julian calendar.

Events

Summer – Melus of Bari, a Lombard nobleman, revolts and is supported by Norman mercenaries at Capua. He marches into Apulia to catch the Byzantine army off-guard. Melus defeats the Byzantines on the banks of the Fortore River and ravages the territory in Apulia.
Winter – Emperor Basil II ("the Bulgar Slayer") replaces Leo Tornikios with the new catapan Basil Boioannes and sends him reinforcements (including a detachment of the elite Varangian Guard) from Constantinople.

January 6 – Cnut ("the Great") is crowned king of England. In July he marries Emma of Normandy, the widow of Æthelred the Unready, securing his ties with Normandy.
Cnut divides England into four earldoms: Wessex, Mercia, East Anglia and Northumbria. who marries Fujiwara no Kanshi, daughter of Michinaga.
Michinaga makes a pilgrimage to the Iwashimizu Shrine in Japan accompanied by many courtiers. The travelers divide themselves amongst 15 boats for a floating trip down the Yotogawa River. One of the vessels overturns and more than 30 people lose their lives.
Ahimaaz ben Paltiel, Italian-Jewish liturgical poet (d. 1060)
Bermudo III (or Vermudo), king of León (approximate date)
Floris I, count of Friesland west of the Vlie (approximate date)
Ramanuja, Indian Sri Vaishnavism philosopher (d. 1137)
Vikramabahu (Kassapa VI), king of Sri Lanka (d. 1041)
Zhou Dunyi, Chinese philosopher and cosmologist (d. 1073)