LXVII THE POLITICAL AND SOCIAL RECONSTRUCTION OF THE WORLD

715.	The domains of the Caliph Walid I extended from the Pyrenees to China.
1227.	Jengis Khan died. Khan from the Caspian to the Pacific, and was succeeded by Ogdai Khan.
1228.	Frederick II embarked upon the Sixth Crusade, and acquired Jerusalem.
1240.	Mongols destroyed Kieff. Russia tributary to the Mongols.

1241.	Mongol victory in Liegnitz in Silesia.
1250.	Frederick II, the last Hohenstaufen Emperor, died. German interregnum until 1273.
1251.	Mangu Khan became Great Khan. Kublai Khan governor of China.
1258.	Hulagu Khan took and destroyed Bagdad.
1260.	Kublai Khan became Great Khan.
1261.	The Greeks recaptured Constantinople from the Latins.
1273.	Rudolf of Habsburg elected Emperor. The Swiss formed their Everlasting League.
1280.	Kublai Khan founded the Yuan dynasty in China.
1292.	Death of Kublai Khan.
1293.	Roger Bacon, the prophet of experimental science, died.
1348.	The Great Plague, the Black Death.
1360.	In China the Mongol (Yuan) dynasty fell, and was succeeded by the Ming dynasty (to 1644).
1377.	Pope Gregory XI returned to Rome.
1378.	The Great Schism. Urban VI in Rome, Clement VII at Avignon.
1398.	Huss preached Wycliffism at Prague.
1414-18.	The Council of Constance.

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