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.
You can also contact the Library & Archives through this form.
The Detre Library & Archives will be closed to researchers on Saturday, March 31.