Norwich Cathedral
The most complete Norman Cathedral in England and one of the finest examples of Romanesque architecture in Europe, Norwich Cathedral is one of England’s finest Cathedrals. Free to look around (although donations are welcome), there's always something to do, and they have art exhibitions and free (secular) events throughout the year, on top of the religious services
https://www.cathedral.org.uk/visit/things-to-see-and-do
