University of Notre Dame
University of Notre Dame: Of God and His Creatures
This site from the University of Notre Dame provides the text documents of all the books of St. Thomas Aquinas work entitled "Of God and His Creatures". This site is very deep and quite exhausting to read.
Steven Kreis, PhD
The History Guide: Aquinas and Alighieri
A lecture on the medieval philosopher, Saint Thomas Aquinas, and writer Dante Alighieri.