[7] This work, dedicated to Gebhard, archbishop of Salzburg, was intended to refute a polemic letter of Wenrich on behalf of Emperor Henry IV, written c.1080-1.
[8] A strong supporter of Pope Gregory VII, and the Gregorian revolutionary reforms, Manegold shared with others of his time the view in political thought that secular rulers held their power on the basis of some kind of pact with the ruled.
[13] Manegold's sources included St Paul, Jerome, Peter Damian and Bernold;[14] also Pseudo-Chrysostom's Opus Imperfectum in Matthaeum, for the way the 'pact' theory was expressed.
He was a critic of Macrobius, singling out for attack in geography the spherical Earth theory of four isolated continents of Crates of Mallus, on theological grounds.
[17] I. S. Robinson (1978), Authority and Resistance in the Investiture Contest: The Polemical Literature of the Late Eleventh Century, New York: Manchester University Press.