his nephew Stephen of Blois and the 20-year-old Matilda, daughter and heiress of Eustace III, count of Boulogne. This gives Stephen control of the County of Boulogne and also lands in England that has belonged to Eustace (who dies on his return from the Holy Land). Asia November – Jin–Song War: Emperor Taizong of the Jurchen-led Jin Dynasty declares war on the Chinese Song Dynasty – and orders his armies to invade Song territory. He sends the Western army to the city of Taiyuan in Shanxi province and the Eastern army to Bianjing (modern-day Kaifeng), the Song capital. The Song forces are not expecting an invasion and are caught off guard. The Khamag Mongol, a Mongolic tribal confederation, begins to play an important role on the Mongolian Plateau. They occupy the fertile lands of the basins of the rivers Onon, Kherlen and Tuul in the Khentii Mountains. By topic Arts Albert of Aix, German historian and writer, begins his Historia Hierosolymitanae expeditionis (approximate date). Education March 29 – Reading School is founded in Berkshire in England. Religion A collection of Zen Buddhist koans is compiled, in the Chinese Blue Cliff Record. Births October 17 – Lu You, Chinese poet and writer (d. 1209) date unknown Abraham ben David, French rabbi (approximate date) Baldwin of Forde, English archbishop (approximate date) Bolesław IV (the Curly), duke of Poland (approximate date) Chueang, Thai ruler of the Ngoenyang Kingdom (d. 1192) Eystein II (Haraldsson), king of Norway (approximate date) Fernando Rodríguez de Castro, Spanish nobleman (d. 1185) Giovanni de Surdis Cacciafronte, Italian bishop (d. 1184) Guigues V, count of Albon and Grenoble (approximate date) Imad ad-Din al-Isfahani, Persian historian and writer (d. 1201) Matilda of Savoy, queen consort of Portugal (d. 1157) Otto II (the Rich), margrave of Meissen (d. 1190) Reginald of Châtillon, French nobleman (d. 1187) William de Vesci, Norman High Sheriff (d. 1184) William of Æbelholt, French churchman (d. 1203) Deaths January 24 – David IV (the Builder), king of Georgia (b. 1073) April 12 – Vladislaus I, duke of Bohemia (b. 1065) May 19 – Vladimir II, Grand Prince of Kiev (b. 1053) May 23 – Henry V, Holy Roman Emperor (b. 1086) June 22 – Lambert of St-Bertin, French chronicler September 14 – Constance, princess of Antioch (b. 1078) September 27 – Richeza of Berg, duchess of Bohemia October 21 – Cosmas of Prague, Bohemian chronicler December 3 –