http://wesley.nnu.edu/biblical_studies/wycliffe/
The Wesley Center for Applied Theology has John Wycliffe's translation of the Bible, with original spellings, available for download both by book and in its entirety.
Medieval Sourcebook
http://www.fordham.edu/halsall/source/1382wycliffe.html
A compilation from Fordham University of the text of primary sources from the Medieval Ages, including, here, the Bull of Pope Gregory XI against John Wycliffe, and Wycliff's reply.
The Reformation Guide
http://www.educ.msu.edu/homepages/laurence/reformation
An extensive listing of Web sites with primary documents from and additional information about key historical figures in the Reformation, compiled by the College of Education at Michigan State University.
The Metropolitan Museum of Art: Timeline of Art History