Good to know
Cancellation after payment is unfortunately no longer possible. A refund is only possible when the museum has to cancel the programme due to government measures.
A booking for a guided tour alone does not give access to the museum. You need entrance tickets for that. In the case of a regular tour, these are automatically included when you book your spot in a tour. In the case of a private tour, you have to book these separately after you have booked the private tour.