Congresses 519 Congrès 365 History 349 History and criticism 243 Criticism and interpretation 156 Kongress 143 Histoire 109 mer ... Philosophy 84 Economic conditions 77 Aufsatzsammlung 75 Geology 75 Social conditions 70 Civilization 66 Politics and government 65 Study and teaching 62 Social aspects 57 Women 57 Histoire et critique 51 Antiquities 49 Science 45 Operas 43 Environmental aspects 36 Foreign relations 36 Research 35 Economic aspects 34 Economic policy 34 Motivation (Psychology) 34 Philosophie 33 Intellectual life 32 Congrès 30 mindre ...