Please see MaryKate Wust’s fascinating story in Penn Medicine News about the Pennsylvania Hospital’s Historic Medical Library!:
“The Historic Medical Library in the Pine Building — the first of its kind in the country — is home to many of these historic gems, making it no surprise that it was designated the “largest and most important” medical library nationwide by the American Medical Association in 1847. But amidst the rare incunabula (books printed before 1501) and beautifully illustrated anatomical and botanical volumes, there are also some unexpected sources of history and intrigue — including the humble library catalog.”
https://penntoday.upenn.edu/news/leafing-through-pages-medical-library-history