The 14th century 'Dublin Apocalypse' has been digitised and goes online today. One of the finest illustrated volumes held in the Library at Trinity College Dublin, it is a handwritten version of the Book of Revelation accompanied by vivid and lavish illustrations. This last book of the Bible is one of its most complex, full of symbols and visions including the four horsemen of the Apocalypse.
This page shows the Witnesses ascending into Heaven as a city falls. The full digitised version can be seen here.