Crusades

On 15 July 1099, Crusaders broke into Jerusalem after a five-week siege and three years of marching. Raymond of Aguilers described men riding through the Temple Mount in blood up to their horses' bridles.

On 12 April 1204, Crusaders breached the walls of Constantinople. They had set out to free Jerusalem. They ended up sacking the greatest Christian city in the world - and dismantling the one barrier standing between Europe and the Ottoman advance.

In 1096, a woman set out for Jerusalem from France with a goose from her farm. Peasant crusaders took it as divine guidance. The goose died in northeastern France and never got close to the Holy Land. The people who followed it left a different kind of trail.

On 12 March 1088, a French monk named Odo was elected pope in a small gathering in Terracina — unable to enter his own city. Seven years later, he launched the First Crusade. He died before he knew it had succeeded.