History 27 Watercolor painting, American 16 Watercolor painting 12 Art and artists--Pennsylvania--Philadelphia 8 Natural history 8 Description and travel 7 Drawing, American 7 more ... Art, American 6 African Americans 5 Histoire 5 Painters 5 Painting, Modern 5 Watercolors--19th century 5 Art, Modern 4 Natural history collections 4 Turtles 4 Architecture 3 Art 3 Art and Artists--19th century 3 Artists 3 Artists--Pennsylvania--Philadelphia--20th century 3 Exhibitions 3 Free African Americans 3 Homes and haunts 3 Painting, American 3 Portraits 3 Slavery 3 Technique 3 Views 3 Works Progress Administration 3 African American abolitionists 2 African American businesspeople 2 African American soldiers 2 Art and artists--20th century 2 Buildings, structures, etc 2 Centennial Exhibition (1876 : Philadelphia, Pa.) 2 Cooking 2 Drawing 2 Engraving--19th century 2 Family 2 less ...