Dendrochronology dates the time of the cutting of the roof timbers of the library at Wells Cathedral at about 1450, so it is likely that the building was erected shortly afterwards. Like many such libraries had, and still have, a number of chained books that cannot be removed without being unlocked. This practice dates from the time when books were rare and expensive. One of the oldest volumes in the library is Pliny's "Natural History". It was printed in Venice in 1472 five years before Caxton printed the first book in England.
photo © T. Boughen Camera: Olympus OMD E-M10