History 766 Societies, etc 436 Manuscripts 424 Sources 314 Ethnic groups 278 Religious life 242 Church societies 212 more ... Churches 203 Bibliography 166 Manuscripts, American 163 Archives 162 Genealogy 160 Greek Americans 120 Polish Americans 115 Irish Americans 92 Catalogs 89 Politics and government 87 Estate administration--19th century 83 Jews 81 Accounts--19th century 78 Poetry--19th century 78 Vital records 76 Merchants--Pennsylvania--Philadelphia--18th century 70 African Americans 68 Description and travel 64 Education 60 Indians of North America 59 Histoire 58 Social life and customs--19th century 53 Italian Americans 50 Schools 49 Shipping--Pennsylvania--Philadelphia--18th century 46 Autographs 45 Lithuanian Americans 45 Weather--Personal accounts 44 International trade--18th century 42 United States--History--Revolution, 1775-1783 41 Merchants--Pennsylvania--Philadelphia--19th century 40 Rare books 39 German Americans 38 less ...