Early works to 1800 Islam 65 Sufism 43 Doctrines 37 Hadith 28 History 15 Religious life 15 Islamic ethics 14 Islamic law 14 Political science 12 Religious aspects 12 Collected works 10 Texts 10 Customs and practices 9 Philosophy 9 Criticism, interpretation, etc 8 Civilization 6 Crusades 6 Description and travel 6 History and criticism 6 Military art and science 6 Islam and state 5 Architecture 4 Asceticism 4 Authorities 4 Death 4 Fatwas 4 Islamic Empire 4 Psychology 4 Shafiites 4