If you like this kind of stuff, there's a Dutch researcher who maintains a blog about old books, many of which are in old Dutch: https://medievalbooks.nl/ https

If you like this kind of stuff, there's a Dutch researcher who maintains a blog about old books, many of which are in old Dutch: https://medievalbooks.nl/ https://medievalbooks.nl/ Sadly not updated in over a year, but there are a lot of gems in the archives.