University of Michigan Papyrology Collection
The Papyrology Collection of the University of Michigan Library is an internationally respected collection of ancient papyrus and a center for research on ancient culture, language, and history. With over 7,000 items and more than 10,000 individual fragments, the Collection is by far the largest collection of papyrus in the United States.
Source: Wikipedia — University of Michigan Papyrology Collection (CC BY-SA 4.0)