Sources
The Black Death
http://nicholasvmmuseum.wikispaces.com/Middle+Ages+Artifacts
http://www.history.com/topics/black-death
The Crusades
http://newvision2012.weebly.com/the-crusades.html
http://www.middle-ages.org.uk/the-crusades.html
The Renaissance
http://www.history.com/topics/italian-renaissance
http://www.skwirk.com.au/p-c_s-56_u-422_t-1105_c-4271/wa/sose-history/renaissance-and-reformation/renaissance-in-europe/introduction-what-was-the-renaissance-
The Middle Ages
http://www.youtube.com/watch?v=COTxnTQuJd8
http://www.youtube.com/watch?v=VIJlFBAAjvE