Building and interior together
The restoration by architect Helmut Hentrich is an important point of reference when looking around. Ask how the tour links the building, the interior and later alterations. That way you avoid automatically assuming that everything you see is equally old.
The garden is part of the appointment
The gardens are not accessible without permission either. Discuss which parts the guide will show and how much time is set aside for them. A guided tour usually lasts about one to one and a half hours, depending on the format agreed.
Events determine availability
There is no fixed weekly museum schedule. Parties and other bookings affect availability, especially around Friday and Saturday. Contact the venue directly and wait for confirmation of date, group size, price and accessibility before you finalise the visit.
Before you go
No open access to the castle or garden. Have the visiting option and guidance confirmed directly in advance.
Sources
This information has been compiled from public sources. Not everything has been confirmed by the museum itself; please check opening hours and prices on the museum's website.