Detail of medieval manuscript from Dr. Edgar Melton's medieval history site: http://www.wright.edu/~h.melton/h102/notes.htm

My field of study is the literature of the Middle Ages (ca. 500 - 1500 A.D.)

Here are some links that you may find useful.

• The  Labyrinth -- Georgetown U.'s one-stop shop for all things medieval. The best starting point.
• The Pontifical Institute for Mediaeval Studies at the U. of Toronto. The name pretty well says it all.
• The Medieval Institute at Western Michigan U. -- Home of North America's premier medieval studies conference.
• The Medieval Academy -- publishers of Speculum, the leading journal in the field.
• Records of Early English Drama (REED) Project at U. of Toronto. Some of the most helpful scholars I've ever met.
• Gerard NeCastro's medieval lit page at the U of Maine at Machias. Terrific resource for dramatic texts.