Islamic Empire -- History 46 History -- 31 Islamic civilization 17 Caliphs 13 Islam -- 13 Biography 6 more ... Caliphs -- 6 Umayyad dynasty 6 Abbasids 4 Arabs -- 4 Kings and rulers 4 Politics and government 4 Civilization, Arab 3 Civilization 2 Crusades 2 Historiography 2 History, Military 2 Intellectual life 2 Islam 2 Islamic Empire 2 622-661 1 Arabian Peninsula -- 1 Assassins (Ismailites) 1 Biography -- 1 Caliphate 1 Civilization, Medieval 1 Doctrines 1 Economic conditions 1 Islam and secularism 1 less ...