Museums in Germany are generally shut on Mondays (you can find exceptions); the precise opening several hours on other days count on the museum. In order to go to a museum on the general public holiday, Examine with them right before to be sure they open on that working day. https://technikzon.de/2024/07/19/vorteile-von-it-support-fur-unternehmen-effizienz-sicherheit-und-kundenbindung-steigern/