The Labyrinth http://www.georgetown.edu/labyrinth/labyrinth-home.html the place to start: browse or search by subject ORB: Online Reference Book for Medieval Studies http://orb.rhodes.edu/ includes a useful encyclopedia on medieval topics Internet Medieval Sourcebook http://www.fordham.edu/halsall/sbook.html a compendium of original sources on all varieties of medieval thought The Catholic Encyclopedia http://www.newadvent.org/cathen useful for research on medieval religious topics Internet Women's History Sourcebook http://www.fordham.edu/halsall/women/womensbook.html a staggering array of sources on medieval women, medieval women writers, and related topics Medieval Feminist Index http://www.haverford.edu/library/reference/mschaus/mfi/mfi.html search it for relevant scholarship on medieval women and related topics