This visual representation of LC Collection holdings by Matt Miller is oddly mesmerising (the dots do stop moving!).

You can view each class and then hover over the dots to see more detail about each category. PR is not as big as I thought it’d be.

https://medium.com/@thisismattmiller/library-of-congress-holdings-by-lcc-51fb5eb868f2

https://medium.com/@thisismattmiller/library-of-congress-holdings-by-lcc-51fb5eb868f2