Faisal I bin Hussein bin Ali al-Hashemi, popularly known as Faisal I of Iraq, was the King of Iraq who ruled between 1921 and 1933. A prominent figure in the pan-Arabism movement, he was the son of the Grand Sharif of Mecca, Hussein bin Ali, who became the self-proclaimed King of the Arab lands in 1916. He was also the King of Syria and Lebanon for a brief period of time in 1920. Faisal I played a very important role in breaking the Ottoman rule. He also tried to bridge the gap between the Shia and Sunni Muslims in order to promote the pan-Arabism movement. After the First World War, Faisal I signed the Faisal–Weizmann Agreement, along with Dr Chaim Weizmann. The agreement included supporting the British in helping build a Jewish homeland in Palestine. As the king, he attempted to diversify his administration by including different religious and ethnic groups in important official positions.