Query: What was the purpose of the Third Crusade?
Context: During the 12th and 13th centuries, there were a series of conflicts between those states and the surrounding Islamic states. Appeals from those states to the papacy led to further crusades, such as the Third Crusade, called to try to regain Jerusalem, which had been captured by Saladin (d. 1193) in 1187.[Z] In 1203, the Fourth Crusade was diverted from the Holy Land to Constantinople, and captured the city in 1204, setting up a Latin Empire of Constantinople and greatly weakening the Byzantine Empire.