History 165 History -- 152 Islamic civilization 51 Islamic Empire -- 41 Caliphs 35 Islam -- 35 Politics and government 33 more ... Arabs -- 20 Biography 17 Muslims -- 17 Islam 16 Intellectual life 15 Islamic Empire 15 Politics and government -- 15 Civilization 14 Abbasids 11 Biography -- 11 Civilization, Arab 11 Civilization, Arab -- 10 Arab countries -- 9 Foreign relations -- 9 Islamic civilization -- 9 Relations -- 9 Crusades 8 Kings and rulers 8 Umayyad dynasty 8 Caliphs -- 7 Description and travel 7 Historiography 7 History, Military 7 less ...