Timeline

1095	Mar	The Council of Piacenza
		A delegation led by the Byzantine Emperor Alexius Comnenus visited Pope Urban II to raise the problems he was having fighting the Muslims in the East. Pope Urban removed the excommunication that had been placed on the Emperor by Pope Gregory and promised to help.
	Nov 27	The Council of Clermont
		On the last day of the council Pope Urban II preached about the oppression being inflicted on the Christians in the Middle East by the Muslim Seljuks. Christian churches were being destroyed and Christians attacked. The Pope called for the Christians in the West to help.
1096	Oct	Raymond starts his crusade
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1097	Apr	Crusaders reach Constantinople
1099	Jul 15	Crusaders take Jerusalem
		The Crusaders take Jerusalem and Godfrey of Bouillon becomes King of Jerusalem.