siege and withdraws. September – Saladin invades the Jazira Region, ending the truce between him and the Zangids. After a feint attack on Aleppo, he crosses the Euphrates. The towns of the Jazira fall before him; the cities of Edessa, Saruj and Nisibin are captured in October. Saladin presses on to Mosul, and begins the siege of the city on November 10. November – Al-Nasir, caliph of the Abbasid Caliphate, is shocked by the war between fellow-Muslims and tries to negotiate a peace. Saladin, thwarted by the strong fortifications of Mosul, retreats to Sinjar. He marches to conquer Diarbekir, the richest and the greatest fortress of the Jazira Region (with the finest library in Islam). December – Baldwin IV raids through the Hauran and reaches Bosra, while Raymond of Tripoli recaptures Habis Jaldak. A few days later, Baldwin sets out with a Crusader force to Damascus and encamped at Dareiya in the suburbs. He decides not to attack the city and retires laden with booty, to spend Christmas at Tyre. Winter – Raynald of Châtillon, lord of Oultrejordain, orders the building of five ships which are carried to the Gulf of Aqaba at the northern end of the Red Sea. Part of his fleet makes a raid along the coast, threatening the security of the holy cities on Pharaoh's Island (or Île de Graye). Europe Spring – King Philip II (Augustus) confiscates all the lands and buildings of the Jews and expels them from Paris. The measures are profitable in the short-term – the ransoms alone bringing in 15,000 marks and enriching Christians at the expense of Jews. Ninety-nine Jews are burned alive in Brie-Comte-Robert. May 12 – King Valdemar I (the Great) dies after a 28-year reign in which he has gained independence from the Holy Roman Empire. He is succeeded by his 19-year-old son Canute VI, who becomes ruler of Denmark. Mieszko III (the Old), duke of Greater Poland, agrees with his son Odon of Poznań to divide the territories between them: Mieszko hold his western lands and Odon receives the eastern lands south of the River Obra. May – June – Béla III, king of Hungary, ravages the region of Belgrade and Barancs (modern-day Braničevo). Meanwhile, Serbia allies itself with Hungary to gain independence. September 14 – Legend of Nazaré: Dom Fuas Roupinho, alcalde of Porto de Mós, is inspired by a Marian miracle to erect the