Subject
- Architectural Types18
- Architecture18
- Events18
- Exhibition Buildings[remove]18
- Exhibitions18
- Philadelphia Centennial Exposition, 187618
- Photographic Types and Formats18
- Public Buildings18
- Stereographs18
- Interiors10
- Machinery3
- Rail Transport2
- Railway Buildings and Structures2
- Railway lines2
- Transportation2
- Arms and Armaments1
- Artillery1
- Engines1
- Gardens1
- Memorial Hall (Philadelphia)1