Catholic Encyclopedia - 758-817 or 818. St. Theophanes and his wife both entered monastic life. He signed the decrees of Nicaea II. www.newadvent.org/cathen/14623a.htm
Catholic Online - Biography of St. Theophanes. saints.catholic.org/saints/theophanes.html
For All the Saints - Biographical profile. users.erols.com/saintpat/ss/0312.htm#theo
The Ecole Glossary - Biographical sketch of this "outspoken iconodule". cedar.evansville.edu/~ecoleweb/glossary/theophanesc.html