The First Crusade, announced by Pope Urban II in 1095, captured Jerusalem after a gruelling campaign in July 1099. The surviving leaders had to make immediate decisions about the government of this newly acquired territory and they elected their first ruler with some urgency in the face of imminent attack from Egypt. Following Christian victory in the battle of Ascalon, the elected ruler, Godfrey of Bouillon, supported by Arnulf of Chocques, who was appointed interim patriarch of Jerusalem at the same time, had the enormous task of imposing Latin rule over a small landlocked kingdom surrounded by hostile territory. Their efforts in this regard were disrupted: firstly by the arrival of Archbishop Daibert of Pisa, in whose favour Arnulf was deposed, and then by Godfrey’s death in July 1100. There ensued a power struggle between King Baldwin I, Godfrey’s brother and heir, and Patriarch Daibert that reached a spectacular showdown in the Church of the Holy Sepulche at Easter 1101.