I found out on the weekend, by happy chance, that there's a special exhibition running in Bamberg:
Die Bamberger Kaisergewänder unter der Lupe. Methoden und Ergebnisse der aktuellen Forschungen. The exhibition started on September 25 and will run until January 10, 2021. It is presenting the results of the research done on the imperial garments that are conserved in Bamberg in the last five years. These are splendid pieces, and I will definitely go there to look at them - it's almost on my doorstep, after all!

There's also two virtual exhibitions that might be interesting: One about the cultural history of distancing (and social distancing), and one showing some works of Albrecht Dürer. Both are in German (and they were a bit awkward to look at in my browser).