Religion & Science
Leonardo da Vinci -- 25 thumbnails of devices invented or improved upon by da Vinci in practice or theory
The Crusades -- A clear, accessible, multi-page overview of each of the seven crusades is provided by Dr. E. L. Knox.
Medieval Philosophy: Introduction -- Concise and helpful introduction to Medieval Philosophy and its historical background and context
Proofs for the Existence of God -- Excerpts from works by Anselm of
Canterbury and Thomas Aquinas.