Dissertations Dissertations, Academic 12 History 2 History -- 2 Arabic language -- 1 Authorities 1 Ayyubids -- 1 Civilization 1 Commerce 1 Early works to 1800 1 Economic aspects 1 Economic conditions 1 Economics -- 1 Grammar -- 1 Hadith -- 1 History, Naval 1 Income tax -- 1 Islam 1 Islam -- 1 Islamic Empire 1 Markets -- 1 Muslim philosophers 1 Muslim pilgrims and pilgrimages -- 1 Philosophy 1 Politic and government 1 Religious aspects -- 1 Scientists -- 1 Social sciences -- 1 Sources 1 Taxation -- 1