THE OMAYYADS (661-750 A.D.) 175 Foundation of the Omayyads, 175. Yazid made caliph, 176. Siege of Mecca, 177. Abdul-Malik, caliph, 179. Siege of Mecca, 180. The eastern caliphate, 184. Suleiman’s ambitions, 185. The last Omayyads, 186.