Final answer:
Urban II called the First Crusade which aimed to reclaim Jerusalem.
Step-by-step explanation:
Urban II called the First Crusade. He was the Pope of the Catholic Church from 1088 to 1099. Urban II delivered a speech at the Council of Clermont in 1095, urging Christians to take up arms and reclaim Jerusalem from the Seljuq Turks.
Learn more about Pope Urban II and the First Crusade