If you would like to learn more about life in the middle ages, you can download a list of recommended reading here. Or you could check out some of the links listed below.
The knight
Feudalism
Hofstelsel en horigheid (Dutch)
Geoffroi de Charny
The Book of Chivalry
Medieval horse breeds
De kruistochten (Dutch)
Crusades
The Crusades (1095–1291)
The Great Crusades: A Woman's Role
Electronic Dictionary of Chretien de Troyes
Background information on Le Chevalier de la Charrette
A Boke of Gode Cookery
Medieval recipes
Medieval medicine in Western Europe
Galenus and the theory of the humours
The Trotula
Medicine in Medieval times (With thanks to Mr. Tomi Cook and Kelly for the heads-up)
Medieval life and times
The Medieval lifestyle (With thanks to Mr. Tomi Cook and Kelly for the heads-up)
Library of the University of Chicago, Medieval & Byzantine Studies
Medieval art research
On-line reference book for medieval studies
Digitised manuscripts
Internet medieval sourcebook
DBNL (Dutch)
Codices Electronici Sangallenses (CESG) – Virtual Library
Early Manuscripts at Oxford University
Shadow Realm, Medieval Maps
The Corpus of Medieval Narrative Art