Subject
- Astronomical Observatories[remove]41
- Research Facilities41
- Astronomy30
- Science30
- Geodesic Conference, Nice, 188719
- Architecture11
- Scientific Equipment10
- Astronomical instruments7
- Architectural Types5
- Optical Devices4
- Dwellings3
- Photographic Types and Formats3
- Solar Eclipse observations (6 April 1875), 18753
- Stereographs3
- Telescopes3
- Architectural Elements2
- Houses2
- Libraries2
- Public Buildings2
- Architectural Styles1