The Ecole Glossary: Gregory III - - Brief biography, by Karen Rae Keck. http://www2.evansville.edu/ecoleweb/glossary/gregoryiii.html
Encyclopædia Britannica: Gregory III - - Very brief summary of his pontificate. In the 11th edition (1911). http://encyclopedia.jrank.org/GRA_GUI/GREGORY_III.html
Pope Saint Gregory III - - Pious reflection on his election and pontificate. By Terry Matz. http://www.catholic.org/saints/saint.php?saint_id=53
Pope St. Gregory III - - A Syrian, was elected the successor of Pope St. Gregory II by acclamation, d. 741. http://www.newadvent.org/cathen/06789a.htm
St. Gregory III - - Short biography by Joseph Brusher. http://www.ewtn.com/library/MARY/GREG3.htm
