History -- History 35 Caliphs 26 Abbasids 10 Islam 8 Crusades 7 Umayyad dynasty 7 more ... Islam -- 4 Islamic civilization 4 Politics and government 4 Arabs -- 3 Biography 3 Caliphate 3 Chronology 3 Crusades -- 3 Early works to 1800 2 Fatimites -- 2 Islam and state 2 Kings and rulers -- 2 Religious aspects -- 2 Riddah Wars 2 Shiah -- 2 Siffin, Battle of, Syria, 657 2 Umayyad dynasty -- 2 Alids 1 Apostasy -- 1 Assassins (Ismailites) 1 Ayyubids 1 Caliphate -- 1 Caliphs -- 1 less ...