Pope Urban II was a leader of the Catholic Church during the 11th century. He is best known for launching the First Crusade in 1095, which was an effort to reclaim the Holy Land from Muslim rule. He also worked to reform the Church, encouraging the establishment of new monasteries
From Wikipedia
Pope Urban II, otherwise known as Odo of Châtillon or Otho de Lagery, was the head of the Catholic Church and ruler of the Papal States from 12 March 1088 to his death. He is best known for convening the Council of Clermont, which ignited the series of Catholic military expeditions known as the Crusades.