behind the army). Philip withdraws across the River Epte, where the bridge collapses under the weight of the retreating army. Meanwhile, Richard sacks the town of Évreux, which is a possession of Philip's ally, John. November 20 – Emperor Henry VI enforces the inheritance claims by his wife, Constance I, against her illegitimate nephew, King Tancred of Lecce (who died on February 20). He takes Palermo (supported by the navy of Pisa and Genoa) and gains control of all of Sicily – ending Norman rule in Italy after 90 years. December 25 – Henry VI deposes the 8-year-old William III (son of Tancred de Lecce) and is crowned king of Sicily. The next day, Constance I, who stays in the town of Iesi, gives birth to Frederick II, the future emperor of the Holy Roman Empire. Levant October – Leo I (Lord of the Mountains), ruler of Armenian Cilicia, invites Bohemond III of Antioch to Bagras, ostensibly to resolve their differences. Upon Bohemond's arrival, Leon captures him and his family, and takes them to the capital of Sis. Seljuk Empire March 10 – Sultan Toghrul III is defeated and killed in battle with Ala ad-Din Tekish, near Rey in Persia – ending the Seljuk Dynasty of Hamedan. The Seljuk Empire passes to the Khwarazmian Dynasty. China July 24 – Emperor Guang Zong (or Zhao Dun) is forced to abdicate the throne to his 25-year-old son Ning Zong, who succeeds him as ruler of the Song Dynasty. During his reign, he will be dominated by his prime-minister Han Tuozhou (or Han T'o-Chou). The Yellow River experiences a major course change, taking over the Huai River drainage system for the next 700 years. Mesoamerica Hunac Ceel drives the Itza people out of Chichen Itza, forcing them to start the Itza Kingdom on Lake Petén Itzá (modern Guatemala). By topic Commerce May 2 – Richard I grants Portsmouth market-town status with a royal charter. He orders the construction of docks on The Solent – having seen that the harbour is a perfect base for trade and the English fleet. Economy and Society Hubert Walter, vice-regent in the absence of Richard I, institutes the office of coroner to keep records of crown pleas. He also presides over the feudal judgment of John and makes an inquiry into land tenure. Religion July 10 – A fire devastates Chartres Cathedral. Only the crypt, the towers, and