Black Monday, Dublin: A group of 500 recently arrived settlers from Bristol are massacred by warriors of the Irish O'Byrne clan. The group (accompanied by women and children) leaves the safety of the walled city of Dublin to celebrate Easter Monday near a wood at Ranelagh, and are attacked without warning. Although a relatively obscure event in history, it is commemorated by a mustering of the Mayor, Sheriffs, and soldiers on the day, as a challenge to the native tribes for centuries afterwards. London Bridge is completed by a stone-arched structure. On the bridge are houses built; this is for paying the maintenance, though it has to be supplemented by other rents and by tolls. Asia Spring – The Mongols led by Genghis Khan begin their first invasion against the Western Xia state (or Xi Xia). They push up along the Yellow River, capturing several garrisons and defeating an imperial army. The Mongols besiege the capital Zhongxing – which holds a well-fortified garrison of some 70,000 men (hastily reinforced with another 50,000). Genghis lacks the proper equipment and experience to take the city. In October, an attempt to flood the city by diverting the Yellow River is disastrous and floods the Mongol camp, forcing the Mongols to withdraw. Tamar the Great, queen of Georgia, raids Eastern Anatolia and seizes Kars. She leads a liberational war in southern Armenia. By topic Education In England an exodus of scholars from Oxford leads to the foundation of Cambridge University (approximate date). Markets King Philip II (Augustus) grants a "conduit" to merchants, going to the Champagne fairs (a trade fair organized in different towns of the County of Champagne), guaranteeing the safety of their travel – as any attempt made against them – is now to be considered as a crime of lèse-majesté (an offense against the king). The decision increases again the appeal of the fairs, to merchants from Italy and the Low Countries. In Tuscany the banking firm known as the Gran Tavola (Great Table) is formed; most of the partners are members of the Bonsignori family. Religion February 24 – The Franciscan Order is founded by the Italian priest Francis of Assisi. He and 11 of his followers journey to Rome where he receives approval of his rule from Pope Innocent III. Franciscan friars can not own any possessions of any kind. They wander and preach among the people, helping the