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Pittsburgh · a catalogue study
Edition 2026-10-09.1
A remote or manually navigated catalogue study. The order follows recorded dates, not a pedestrian route; nearby regional places may be far apart. No walking duration is estimated.
Check each place's actual location and visitor rules. A catalogue pin does not grant entry or confirm present access. Use the atlas record and linked sources to plan a visit.
Automatically assembled catalogue study. Where text is drawn from Wikipedia, CC BY-SA 4.0 applies to that text. Wikipedia article and contributor links are included with each applicable stop. Passages may be excerpted or abridged and include additional editorial date context. Other sources and original observation prompts retain their own terms.
1. Baltimore & Ohio Railroad Station — Pittsburgh
Baltimore & Ohio Railroad Station — Pittsburgh · Reported completion / phase: 1887
Baltimore & Ohio Railroad Station — Pittsburgh is a documented Furness-related project in Pittsburgh, PA. The source records the named work in 1887. 1887. Reported year refers to this named building or Furness phase.
Observe: Choose one visible architectural detail. Compare it with another place in this study, then follow a source to check what its date describes.
Access: Article coordinate locates the former site; the lost structure no longer survives.
Record context: 1887. Reported year refers to this named building or Furness phase.
Record context: Article coordinate locates the former site; the lost structure no longer survives.
Atlas: https://tartariamaps.com/?city=pittsburgh-pa&candidate=furness-b-and-o-pittsburgh&detail=1
2. Allegheny County Courthouse
Allegheny County Courthouse · Reported completion / phase: 1888
A massive stone courthouse arranged around a courtyard, with a tall central tower and a bridge to the associated former jail. 1888. The present courthouse was completed in 1888. This record is the courthouse, not a separate count of the adjoining jail.
Observe: Choose one visible architectural detail. Compare it with another place in this study, then follow a source to check what its date describes.
Access: Published coordinate for the identified building; not a city-centre estimate.
Record context: 1888. The present courthouse was completed in 1888. This record is the courthouse, not a separate count of the adjoining jail.
Record context: Published coordinate for the identified building; not a city-centre estimate.
Atlas: https://tartariamaps.com/?city=pittsburgh-pa&candidate=richardson-allegheny-courthouse&detail=1
3. Carnegie Free Library of Allegheny
Carnegie Free Library of Allegheny · Recorded year (source inventory): 1889
The Carnegie Free Library of Allegheny is situated in the Allegheny Center neighborhood of Pittsburgh, Pennsylvania. It was commissioned in 1886, the first Carnegie library to be commissioned in the United States. Donated to the public by entrepreneur Andrew Carnegie, it was built from 1886 to 1890 on a design by John L. Smithmeyer and Paul J. Pelz. The library and musical conservatory was built of red and grey granite from Maine. The contractor was Vinalhaven, Maine's Bodwell Granite Company, which had furnished granite for major public works including the State, War and Navy Department building in Washington, DC., now called the Eisenhower Executive Office Building. It did not open until 1890 thus making it the second Carnegie library to open, after the Carnegie Free Library of Braddock, built for steel-workers in Braddock, 9 miles up the Monongahela River from Pittsburgh, opened in 1889. The building also features the first Carnegie Music Hall in the United States. The year is the source inventory’s recorded inception date. Construction start, opening and later alterations may have separate dates in the linked article.
Observe: Choose one visible architectural detail. Compare it with another place in this study, then follow a source to check what its date describes.
Access: Catalogue location only. Confirm current access and the observation point before travelling.
Record context: The year is the source inventory’s recorded inception date. Construction start, opening and later alterations may have separate dates in the linked article.
Atlas: https://tartariamaps.com/?city=pittsburgh-pa&candidate=Q5043895&detail=1
4. Allegheny Observatory
Allegheny Observatory · Recorded year (source inventory): 1900
The Allegheny Observatory is an American astronomical research institution, a part of the Department of Physics and Astronomy at the University of Pittsburgh. The facility is listed on the National Register of Historic Places (ref. # 79002157, added June 22, 1979) and is designated as a Pennsylvania state and Pittsburgh History and Landmarks Foundation historic landmark. The year is the source inventory’s recorded inception date. Construction start, opening and later alterations may have separate dates in the linked article.
Observe: Choose one visible architectural detail. Compare it with another place in this study, then follow a source to check what its date describes.
Access: Catalogue location only. Confirm current access and the observation point before travelling.
Record context: The year is the source inventory’s recorded inception date. Construction start, opening and later alterations may have separate dates in the linked article.
Atlas: https://tartariamaps.com/?city=pittsburgh-pa&candidate=Q549937&detail=1