Below, are some of the links I have found on nudity throughout history. I am just beginning this article, however, I thought I would atleast put a few links up here for further study..
Search: http://www.google.com/search?hl=en&q=medieval+nude+Christianity&btnG=Search
Search: http://www.google.com/search?hl=en&q=nude+art+history
Anthony Christian.co.uk
Nude Art through History 1 (pictures)
Metmuseum.org
Christian Travelers Guides.com
Gordon University - Nude Models
ocaiw.com
Nude Art through History 2 (pictures)
Artlex.com