History 540 Colonies 288 Discovery and exploration 224 Discoveries in geography 171 Spanish 94 Spanish colonies 82 British colonies 79 more ... History and criticism 78 Administration 72 Indians of North America 71 Antiquities 69 Indians 69 Description and travel 57 Slavery 51 Politics and government 46 Colonization 45 Civilization 42 Explorers 39 Black people 34 Historiography 32 Indians of South America 31 Race relations 31 African Americans 30 Commerce 30 International relations 29 British 28 Indians, Treatment of 28 Relations 28 Slave trade 28 Social conditions 28 less ...