1173

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

1173 was a common year.

Events

Canonization of Saint Thomas à Becket, buried at Canterbury
August 9th – Construction starts on the Leaning tower of Pisa
Castle at Abergavenny was seized by the Welsh.
Conversion to Christianity of Peter Waldo and the subsequent founding of the Waldensians.
End of Qiandao era and start of Chunxi era of the Chinese emperor Xiaozong
End of reign of Polish ruler Boleslaus IV of Poland and start of reign of Casimir II of Poland
Eleanor of Aquitaine and her sons rebel against her husband Henry II of England in the Revolt of 1173-1174
First recorded use of algebraic chess notation