INFORMATION:

The Cathedral was built with the finest brand new materials that the Bishops could buy, borrow or steel. Some stone came from Caen in France, some from the Perbeck Hills in Dorset and most came from the quarry's at Chilmark to the west of Salisbury.

Now when it came to the wall, it would have been too expensive to buy all new stone, so the old Cathedral at Sarum was recycled and as you can see many early Norman pieces of masonry.