Tootfinder

Livraria Bertrand in Lisbon, founded in 1732, is certified by Guinness to be the oldest, continually running book store in the world.
A quick search reveals: Osiander, founded 1596 in Tübingen. Korn und Berg 1531 in Nürnberg. Beck'sche in Vienna 1724 (but closed since 2018?), Höllrigl 1598 in Salzburg, Orell Füssli 1519 in Zürich, Cambridge University Press (and store?) 1534.
Now some of these started as print shops, but often also sold books. Anyone know a text discussing Gu…