Corona update: As from 26 April 2021 city walks in the open air can take place again with a maximum of 10 people per group (guide included). A group visit/tour in a city museum is possible as of 8 May 2021. This date is tentative and subject to the corona measures that are in force at that time. The corona measures limit the maximum number of participants as well. In case you have any questions, please complete our contact form.