Chinese Jin Dynasty. During the summer, the Jurchens try to end the siege by negotiating a peace treaty, but the assassination of a Mongol embassy makes further talks impossible. While the negotiations are going on, a plague is devastating the population of the city. In the meantime, supplies stored at Kaifeng are running out, and several residents of the city are executed on the suspicion that they are traitors. June – Mongol invasion of Korea: Choe Woo, Korean military dictator of Goryeo, orders against the pleas of King Gojong and his senior officials, the royal court, and most of Songdo's population to be moved to Ganghwa Island. Woo starts the construction of strong defenses on Ganghwa Island, which becomes a fortress. The government orders the common people to flee the countryside and take refuge in major cities, mountain citadels, or nearby islands. The Mongols occupy much of northern Korea, but fail to capture Ganghwa Island. December 16 – Battle of Cheoin: Korean forces defeat a Mongol attack at Cheoin (modern-day Yongin). The Mongol Empire concludes a peace treaty with Goryeo and withdraws its forces. Japan November 17 – Emperor Go-Horikawa abdicates in favor of his 1-year-old son, Shijō, after an 11-year reign. Because he is very young, most of the actual leadership is held by his relatives. By topic Literature The original set of woodblocks of the Tripitaka Koreana is destroyed by fire during the Second Mongol invasion of Korea. Markets The northern French city of Troyes issues its first recorded life annuities, confirming the trend of consolidation of local public debts initiated in 1218, by the neighboring city of Reims. Religion May 30 – Anthony of Padua is canonized by Pope Gregory IX at Spoleto, less than a year after his death. He becomes the patron saint of lost items. August – Gregory IX is forced to remain in his summer residence at Anagni by Lombard forces from Rome. October 29 – Gregory IX orders the Stedinger Crusade to be proclaimed in northern Germany. Births March 9 – Chen Wenlong, Chinese scholar-general (d. 1277) November 10 – Haakon the Young, king of Norway (d. 1257) unknown date – Manfred, king of Sicily (House of Hohenstaufen) (d. 1266) probable – Bernard Saisset, French nobleman and bishop (d. 1314) Deaths January 28 – Peire de Montagut, French Grand Master February 21 – Myōe, Japanese Buddhist monk (b. 1173) April 10 –