The famous library of Oxford University is one of the things to see when you visit that town. It was founded by Sir Thomas Bodley, one of the gentlemen of the first Queen Elizabeth, but it certainly contains books older then her time. Some are mediaeval manuscripts. A free exhibition there usually shows a couple of ancient manuscripts but these are certainly not always the same.
This I know because I visited the place several times and saw different books. First time I saw a book, written in Carolingian minuscule that supposedly belonged to Margaret queen of Scots, as well as a book by Christine de Pisan written in early 15th century bastarda. Unfortunately I didn't have a good camera with me, but I had something. Another time I saw an English Psalter from 14th century written in elegant textura. This time I had a better equipment to take a picture.
There is a book available, based on this blog.
On the blog there is, so to speak, more room, one can show more illustrations there. Blogs, however, come and go, there is no certainty that it will be there ten years from now. The book, on the other hand, once you acquire it, will last, one can be sure of that.