The early Islamic kingdoms lasted for quite some time, but were characterized by conflicts with neighbors as well as between dynasties. First the Umayyads ruled from 661-750, then the Abbasids took over from 750-969, and finally the Fatimids came into power from 969-1099. The Fatimids did not fall willingly in 1099 but were conquered by the Christian Crusaders who were intent on taking back Jerusalem. This First Crusade was set into motion with a speech by Pope Urban II in 1095, urging an attack on the Muslims and the liberation of Jerusalem. In addition, he offered indulgences to the crusaders, which were promises of remission for sins in return for funding or other form of support of the Crusade. To his surprise, he received an overwhelming response from the people and they prepared for the conquest of the Holy Lands. The causes of the Crusades were both political, a reaction against the spread of Islam, and religious, a reaction to the persecution of Christians in Jerusalem by the Fatimids who destroyed the Church of the Holy Sepulchre as well as persecuted the Christians. With these underlying factors, the people got ready to travel to Jerusalem and take it back in the name of Christ.
Even though they were poor and ill-equipped compared to the veteran Turkish warriors, the Crusaders were successful in what they came to do. In 1099, Godfrey de Bouillon led the Crusaders to attack Jerusalem from the north and breach the walls, finally conquering the city in July of 1099. Jerusalem finally rested in the hands of the Christians again, which was desired in the first place. Bouillon refuses to take the crown himself and instead gives it to religious authority. During this time, Jerusalem was split into 4 quarters, different than those that exist today. The NW Patriarch’s Quarter was the religious center because of its main feature, the Church of the Holy Sepulcher. In SW was the Armenian Quarter, and in the NE was the Syrian Quarter. The SE Templar’s Quarter was where the Knights of the Templar resided, the group responsible for protecting the Christians who were embarking on pilgrimages to Jerusalem. Under the Crusaders, many changes were made to the buildings and structures as well. They renamed the Islamic monuments of the Dome of the Rock (Templum Domini) and Al-Aqusa Mosque (Templum Solomonis) to rid of Islamic influence. They also rebuilt many of the Byzantine churches that had been destroyed by the Muslims (including the Church of the Holy Sepulcher) and built more new churches (42+). These changes and additions established the Crusader presence in Jerusalem.
The Crusaders’ rule was short-lived, lasting just over 100 years. In 1187, the Muslims defeated the Crusaders at the Horns of Hattin under Salah al-Din (Saladin) and retook Jerusalem. In contrast to the Crusaders’ battle tactics, Saladin actually allowed anyone in the city the right to leave if they wanted to and was generally seen as a merciful ruler. He gave the Church of the Holy Sepulchre to the Greek Orthodox Church, allowing them to practice their own religion, and also permitted Jews to settle in Jerusalem once again. After Saladin’s death, his successors had some trouble managing the land, and they continued to struggle with the Crusaders over Jerusalem for another 100 years. The Crusaders attempted multiple Crusades, most of which failed and did not match the first, and in 1291 their last output at Akko fell.