- Physical difficulty: Moderately difficult
- Length: up to 240 min
- Wheelchair accessibility: Yes
On Sunday, 30 August and 27 September, admission to selected guided tours at this site will be free of charge. Please obtain your free ticket in advance through the online booking system. Capacity for each guided tour is limited. On these special days, the following tours will be available: Main Tour, Chapel of St. Barbara, The Tower.