|Ab urbe condita||1926|
|Balinese saka calendar||1094–1095|
|English Regnal year||19 Hen. 2 – 20 Hen. 2|
|Chinese calendar||壬辰年 (Water Dragon)|
3869 or 3809
— to —
癸巳年 (Water Snake)
3870 or 3810
|- Vikram Samvat||1229–1230|
|- Shaka Samvat||1094–1095|
|- Kali Yuga||4273–4274|
|Japanese calendar||Jōan 3|
|Minguo calendar||739 before ROC|
|Seleucid era||1484/1485 AG|
|Thai solar calendar||1715–1716|
1299 or 918 or 146
— to —
1300 or 919 or 147
|Wikimedia Commons has media related to 1173.|
- The Qiandao era ends, and the Chunxi era begins, of the Chinese Emperor Xiaozong of Song.
- Saladin seizes Aden in Arabia.
- January 5 – On the death of Bolesław IV the Curly, High Duke of Poland, he is succeeded by Mieszko III the Old, and as Duke of Sandomierz in Lesser Poland by Casimir II the Just.
- March – Henry the Young King of England withdraws to the French court, marking the beginning of the Revolt of 1173–74, in which Eleanor of Aquitaine and her sons rebel against her husband Henry II of England.
- William de Braose, 3rd Lord of Bramber, becomes High Sheriff of Herefordshire in England.
- Abergavenny Castle is seized by the Welsh.
- Following the death of Kol, Canute I of Sweden (Knut Eriksson) extends his rule to also include Östergötland. He is now unopposed as king of Sweden.
- The efforts of the Almohad caliph, Abu Yaqub Yusuf, to repopulate the western Andalusian city of Beja begin. They are rapidly abandoned, sign of the quick demographic weakening of the Muslims in the peninsula.
Arts and leisureEdit
- August 8 – The construction of a campanile, which will become the Leaning Tower of Pisa, begins.
- Algebraic chess notation is first recorded.
- February/March – Conrad II, Duke of Swabia (d. 1196)
- May 21 – Shinran, Japanese founder of Jōdo Shinshū Buddhism (d. 1263)
- Llywelyn the Great, Prince of Aberffraw and Lord of Eryri (approximate date; d. 1240)
- Rostislav II of Kiev (d. 1214)
- Isabella, Countess of Gloucester (d. 1217) (approximate date)
- Tankei, Japanese sculptor (d. 1256)
- January 5 – Bolesław IV the Curly, High Duke of Poland (b. 1120)
- March 10 – Richard of Saint Victor, Scottish-born French mystic and theologian
- August 9 – Najm ad-Din Ayyub, father of Saladin
- October 6 – Engelbert III, Margrave of Istria
- October 15 – Petronilla of Aragon, queen regnant (b. 1135)
- November 7 – Uijong of Goryeo, Korean monarch of the Goryeo dynasty (b. 1127)
- date unknown