"The Early Church On-Line Encyclopedia (Ecole) Initiative is a cooperative effort on the part of scholars across the internet to establish a hypertext encyclopedia of early Church history (to the Reformation) on the World-Wide Web."

"Lollardy, or Wycliffism, was England's greatest medieval heresy. The movement originated in the 1370s or early 1380s in Oxford with the followers of John Wyclif (d. 1384).
The purpose of this website, and our society, is to provide a forum for those interested in the study of Lollardy and the religious culture of the later Middle Ages in England. We hope to be accessible to all levels of academic interest." Site includes links and a bibliography.

From a Catholic Encyclopedia article written between 1907 and 1912.

An interesting timeline of materials for the study of Orthodox Church history.