New Advent
Catholic Encyclopedia: Marie De France
This site from The New Advent contains biographical information about Marie de France. Please note that ?The Catholic Encyclopedia? is a historic reference source and should be viewed in the context of resource material dated around 1910.
Other
Bob's Byway: Glossary of Poetic Terms
Calling itself "unique," Bob's is easy to use, with cross-links throughout, phonetic pronunciation guides when necessary, and many examples and quotations. Click on the letter and scroll for the word.