Year 1176 (MCLXXVI) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.
January – The Assize of Northampton is enacted in England.
May 22 – The Hashshashin attempt to murder Saladin near Aleppo.
May 29 – Battle of Legnano: Frederick I, Holy Roman Emperor, is defeated by the Lombard League, leading to the pactum Anagninum (the Agreement of Anagni).
September 17 – Battle of Myriokephalon: The Seljuq Turks defeat the Byzantine Emperor Manuel I Komnenos.
Al-Adil I, the Muslim ruler of Egypt, suppresses a revolt by the Christian Copts in the city of Qift, hanging nearly 3,000 of them on the trees around the city.
Raynald of Châtillon is ransomed from prison in Aleppo.
Construction begins on a stone-built London Bridge.
The first recorded Welsh Eisteddfod is held by Rhys ap Gruffydd at Cardigan.
Unkei completes his Dainichi Nyorai (Enjō-ji) statue, now a National Treasure of Japan.
Sens Cathedral installs an horologe, presumed to be an early form of clock.
The Carthusians are approved as a religious order.
Henry de Bohun, 1st Earl of Hereford (d. 1220)
Leopold VI, Duke of Austria (d. 1230)
William Longespée, 3rd Earl of Salisbury (approximate date; d. 1226)
April 18 – Saint Galdino della Sala, Italian archdeacon
April 20 – Richard de Clare, 2nd Earl of Pembroke, English soldier (b. 1130)
May 13 – Matthias I, Duke of Lorraine (b. 1119)
August 23 – Emperor Rokujō of Japan (b. 1164)
October 12 – William d'Aubigny, 1st Earl of Arundel, English politician (b. c. 1109)
date unknown – Margrethe of Roskilde, Danish local saint
probable
Rosamund Clifford, mistress of Henry II of England (b. 1150)
Michael Aspietes, Byzantine general
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