The public tours are usually included in the entrance fee. If you show a valid admission ticket, you can take part in the public tours without making a reservation.
Exception: our large exhibitions. The number of participants on public guided tours is limited. In order to be able to take part in the guided tour on your desired date, you therefore need a guided tour ticket, which is free of charge but does not entitle you to enter the museum. You will need to buy an additional admission ticket for this.