Ala al-Din Tekish

Ala al-Din Tekish (Persian: علاء الدين تكش; full name: Ala ad-Dunya wa ad-Din Abul Muzaffar Tekish ibn Il-Arslan) or Tekesh or Takesh was the Shah of Khwarazmian Empire from 1172 to 1200. He was the son of Il-Arslan. His rule was contested by his brother, Sultan Shah, who held a principality in Khorasan. Tekish inherited Sultan Shah's state after he died in 1193. In Turkic, the name Tekish means he who strikes in battle.^[4]

Ala al-Din Tekish
Tekish's mausoleum, Kone-Urgench, Turkmenistan
Shah of the Khwarazmian Empire
Reign	11 December 1172 – 3 July 1200
Coronation	11 December 1172[1][2]
Predecessor	Il-Arslan
Successor	Muhammad II
Regent	Terken Khatun
Born	Konye-Urgench
Died	3 July 1200[3]
Spouse	Terken Khatun Inanj Khatun Fulana Khatun
Issue	Ala ad-Din Muhammad Taj ad-Din Ali-Shah Yunus-Khan Toghan-Toghdi Malik-Shah Princess Shah-Khatun
Names Laqab: Ala al-Din (shortly) Kunya: Abul-Muzaffar Given name: Tekish
House	House of Anushtegin
Father	Il-Arslan
Mother	Terken Khatun
Religion	Sunni Islam

In 1194, Tekish defeated the Seljuk sultan of Hamadan, Toghrul III, in an alliance with Caliph Al-Nasir, and conquered his territories. After the war, he broke with the Caliphate and was on the brink of a war with it until the Caliph accepted him as Sultan of Iran, Khorasan, and Turkestan in 1198.

He died of a peritonsillar abscess in 1200^[5] and was succeeded by his son, Ala ad-Din Muhammad.