Year 1117 (MCXVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.
Events
Africa
Conflict between the independent republics of Mahdia and Gabes in Ifriqiya. Madhia is supported by the Zirid dynasty while Gabes receives the aid of the Roger I of Sicily.
Asia
Pelusium is destroyed by Baldwin I of Jerusalem. Miidera and the sohei of Enryakuji attack Nara, Japan.
Europe
Borivoj II of Bohemia becomes prince in place of Vladislav I of Bohemia. The people of Santiago de Compostela (present-day Spain) try to burn their prelate in his palace, along with the queen. Iceland ends slavery. Short-lived Almoravid reconquest of Coimbra (Portugal).
By topic
Education
May 3 – Merton Priory (Thomas Becket School) is consecrated.
Technology
The earliest use of a compass for navigational purposes is recorded.
Births
Humphrey II of Toron, Constable of Jerusalem
Deaths
April 16 – Saint Magnus, Earl of Orkney (executed) December 9 – Gertrud of Brunswick, Markgräfin of Meißen Anselm of Laon, French theologian Ivo of Chartres, French canon lawyer (b. 1040) Bertrade de Montfort, wife of Fulk IV of Anjou and Philip I of France Li Zhiyi, Chinese poet