Subject
- Astronomical Observatories[remove]14
- Research Facilities14
- Astronomy8
- Science8
- Architecture5
- Scientific Equipment5
- Astronomical instruments4
- Photographic Types and Formats3
- Solar Eclipse observations (6 April 1875), 18753
- Stereographs3
- Optical Devices2
- Architectural Elements1
- Architectural Types1
- Cameras1
- Dwellings1
- Greenwich Observatory (Greenwich)1
- Houses1
- National Observatory of Athens1
- Photographic Equipment and Supplies1
- Taronwali Kothi (Lucknow)1