History Architecture 18 African Americans 16 Social conditions 16 Buildings, structures, etc 15 Race relations 11 City planning 6 more ... History and criticism 6 Intellectual life 6 Working class 5 Civil rights 4 Criticism and interpretation 4 Education 4 Haymarket Square Riot, Chicago, Ill., 1886 4 Migrations 4 Politics and government 4 Skyscrapers 4 Women social reformers 4 American literature 3 Architecture and society 3 Art 3 Decoration and ornament, Architectural 3 Description and travel 3 Economic conditions 3 Jews 3 Labor movement 3 Literature publishing 3 Migration, Internal 3 Social life and customs 3 Social reformers 3 less ...