The Great Barn, as I said, was built as big as a church, and in the same way. That's because it need to be as large an open, unrestricted space as possible. The barn has side "aisles" to make it as wide as possible. The columns are whole trees standing on stone blocks, and the roof , which is known as a crown-post roof, is the earliest design of Medieval large-scale roof that exists in England. So this barn really is quite something special,and it surprises me not one jot that it should now be a tourist centre.