Norwich cathedral bosses NOT amateur radio

Norman Norwich cathedral has some of the finest bosses anywhere. The examples shown are in the cloisters. Most of the stones to build the cathedral came from Normandy nearly 1000 years ago, which I find amazing.

To think this was built all that time ago without cranes and mechanical aids we have today.

Also, where did they get the manpower? There are over 1000 medieval churches in Norfolk alone