History 54 Antiquities 24 Congresses 18 Histoire 16 Politics and government 16 Social conditions 14 Relations 12 more ... Foreign relations 11 Economic conditions 10 Civilization 8 Indians of Mexico 8 Indians of Central America 7 Mayas 7 Antiquités 6 Congrès 6 International relations 5 Aufsatzsammlung 4 Conditions sociales 4 Frontier and pioneer life 4 Historiography 4 Indians of South America 4 Pan-Americanism 4 Agriculture 3 Archaeology 3 Commerce 3 Description and travel 3 Ethnic relations 3 Excavations (Archaeology) 3 Historia 3 History and criticism 3 less ...