In church architecture, the circle represents Heaven and the square represents Earth. Thus many steeples on churches are octagonal, representing that the church is midway between Earth and Heaven, pointing the way for the believer to follow. Ely Cathedral has an octagonal lantern atop its transept for a similar reason. A very good book about the symbolism and meaning of church architecture by the way is called “How to read a church” by Dr.Richard Taylor.
I consider Ely to be one of the finest Cathedrals in the world, having visited about 40 of them. Here is my somewhat abstract photograph of Ely’s lantern and a view of the nave, which I consider to have at each end the two finest Norman arches in Europe.
Here are three nice movies about this ancient building, an edifice which I am blessed to see every day as the view from my home.