The Middle Ages
http://www.mnsu.edu/emuseum/history/middleages/
This site from Minnesota State University describes everyday life in the Middle Ages. The web user can choose a Knight, a Merchant, a Nun, or a Peasant as a guide. Brief bibliographies and web links are included.

Gregorian Chant The Music
http://www.schuyesmans.be/gregoriaans/EN/ENmuziek.htm
A concise, colorful and well-illustrated introduction to concepts and musical elements relating to Gregorian Chant is provided here.

Gregorian Chant Web Guide
http://www.msu.edu/~knitter/chantlinks.html
Those interested in a more focused academic study on the theory, literature and cultural themes of Gregorian Chant should visit this site. It includes links to the Thesaurus Musicarum Latinarum, an online database of early music theory, the Handbook on Western Plainchant, and other information on the culture of this musical genre.

Links for More information on Hildegard von Bingen
http://www.healingchants.com/hvb_links.html
This site contains links to the life, times, music, art, and notation style of the composer.

Guillaume de Machaut
http://www.medieval.org/emfaq/composers/machaut.html
The life and times of this poet and composer, along with links to many of his lyrics, is presented at this site, as well as a discography of his music.