Abbey of St Gall Library in Switzerland houses one of the country's oldest literary collection. It holds manuscripts dating back to the century. (Will Pryce/Thames Hudson/BNPS/REX)
The Tripitaka Koreana, Haeinsa Temple, in South Korea. (Will Pryce/Thames…
The George Peabody Library in Baltimore, which was completed in features a black and white marble floor and stunning ornamental balconies. (Will Pryce/Thames Hudson/BNPS/REX)
Admont Abbey in Austria, the largest monastery library in the world, named by Dr Campbell as his favourite library. (Will Pryce/Thames Hudson/BNPS/REX)
Mafra Palace Library, Mafra, Portugal James Campbell: "The Mafra Palace Library in Mafra, Portugal is at 88 meters the longest Rococo monastic library in the world.
Biblioteca Joanina, Coimbra, Portugal Will Pryce: "This is a very imposing library from a time when Portugal was extremely wealthy and powerful. It is very dark but features intricate gold leaf which gives it magical lumosity.