Catholic Encyclopedia - Pope St. Vitalian tried to win over the Monothelites who then held sway in Constantinople, and was the reigning pope at the time of the Synod of Whitby. He died in 672. www.newadvent.org/cathen/15484b.htm
For All the Saints - Brief profile of Pope St. Vitalian. users.erols.com/saintpat/ss/0127.htm#vita
Popes Through the Ages - Short biography of Pope St. Vitalian, from the book by Joseph Brusher. www.cfpeople.org/Books/Pope/POPEp76.htm
The Ecole Glossary - Short biography of St. Vitalian, by Karen Rae Keck. cedar.evansville.edu/~ecoleweb/glossary/vitalian.html