History 25 Social conditions 10 City planning 7 Buildings, structures, etc 5 Social aspects 5 Urbanization 5 Economic conditions 4 más ... Research 4 Social life and customs 4 Government policy 3 Squatter settlements 3 Architecture 2 City and town life 2 Description and travel 2 Education, Higher 2 Environmental aspects 2 Environmental management 2 Housing policy 2 Mayors 2 Medicine 2 Modern movement (Architecture) 2 Politics and government 2 Poverty 2 Public spaces 2 Sociology, Urban 2 Study and teaching 2 Urban renewal 2 Urban transportation 2 Water-supply 2 Women 2 menos ...