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Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1140s 1150s 1160s – 1170s – 1180s 1190s 1200s
Years:	1170 1171 1172 1173 1174 1175 1176 1177 1178 1179
Categories:	Births – Deaths – Architecture Establishments – Disestablishments

The 1170s decade ran from January 1, 1170, to December 31, 1179.

[edit] Events and trends

• 1170—Thomas Becket murdered.
• 1171—Saladin abolished the Fatimid caliphate, restoring Sunni rule in Egypt.
• 1171—King Henry II of England landed in Ireland to assert his supremacy; the Synod of Cashel acknowledged his supremacy.
• 1179—Third Council of the Lateran condemned Waldensians and Cathars as heretics; reformation of clerical life.

[edit] Significant people

• Henry I of England Beauclerc, King 1100–1135.