The Thomas & Katherine Detre Library & Archives at the Senator John Heinz History Center is Western Pennsylvania’s preeminent source for researching the region’s rich history.
Founded in 1879, the Library & Archives preserves the rich history of Western Pennsylvania, and makes its collections accessible to researchers, students, and the general public.
The Library & Archives collection includes:
- 700,000 photographs, prints, and negatives
- 40,000 books, pamphlets, and monographs
- 3,500 individual archival collections of families, organizations, businesses, and industries
- 600 periodical titles
- 500 maps and atlases
Learn more about Western Pennsylvania, a region of cultural and ethnic diversity and unsurpassed significance in the history of industrialization and economic development.
The Library & Archives will close at 3 p.m. on Thursday, April 4. It will also be closed on Saturday, April 27 due to the African American Genealogy Workshop, which will be held there. Please visit the event page for more details.