As if specifically catering to your needs, the Bodleian Library in Oxford currently has an exhibition on called ‘The Romance of the Middle Ages’ which will run until 13th May. The exhibition has both manuscripts and other objects from the medieval period which can help you to get a fuller grasp of the nature and range of medieval romance. It also has a Routes of Romance strand which includes images and text from Wiliam Morris, Burne Jones and Rosetti and a section on Romance and the Modern World which features Tolkien and C. S. Lewis and discusses other fantasy authors (“Susan Cooper, Diana Wynne Jones, Philip Pullman and Kevin Crossley-Holland”) as well as referring to Harry Potter.
This is an interesting resource online (find it here) but also well worth a visit – and it’s a day out that you can justify as work! Entrance appears to be free, and you could take some time to visit Exeter College in Oxford too, where Morris, Burne Jones and Tolkien all studied. Enjoy!