By the mid-13th century, the Crusaders became convinced that Egypt, the heart of Islam's forces and arsenal, was an obstacle to their ambition to capture Jerusalem, which they had lost for the second time in 1244. In 1245, during the First Council of Lyon, Pope Innocent IV gave his full support to the Seventh Crusade being prepared by Louis IX, King of France. The goals of the Seventh Crusade were to destroy the Ayyubid dynasty in Egypt and Syria, and to recapture Jerusalem.