Hisham ibn Abd al-Malik: Timeline

724   Umayyad caliph Yazid II ibn Abd al-Malik (720-724) succeeded by Hisham ibn Abd al-Malik (724-743)

742   After a forty-year vacancy, Stephen becomes Orthodox Patriarch of Antioch at the suggestion of Umayyad caliph Caliph

Caliph is the title for the Islamic leader of the Ummah [i], or community of Islam [i]. ... 

 Hisham ibn Abd al-Malik.

743   Umayyad caliph Hisham ibn Abd al-Malik (724-743) succeeded by al-Walid II Al-Walid II

Walid ibn Yazid or Walid II was an Umayyad [i] caliph [i] who ruled from 743 [i] until 744 [i]. ... 

 ibn Abd al-Malik (743-744).