Making your Mark Explore the graffiti that has been scratched into the fabric of this building down through the ages. Look for hidden gems from signatures to skeletons, discover animals, crosses and kings and search for hard to find examples like the mythical beast. Date and Time Saturday 10 August, 10.30am Tuesday 20 August, 2pm Prices Adult | £10 Concessions | £9 Child 4 - 16 years | £3