Renaissance from Annenberg Media
http://www.learner.org/interactives/renaissance/
PBS Empires: Renaissance
http://www.pbs.org/empires/medici/
Leonardo Da Vinci from the Boston Museum of Science
Renaissance from the History Channel
http://www.history.com/topics/italian-renaissance
Johannes Guttenberg and the Printing Press
http://inventors.about.com/od/gstartinventors/a/Gutenberg.htm