Agnes of Poitiers, empress. [Letter to Albert, abbot of Fruttuaria and the convent] in Zwei Briefe der Kaiserin Agnes 424

[Letter from empress Agnes of Poitiers to Albert, abbot of Fruttuaria and the convent.]
The situation that led to this letter, according to Struve, was Agnes’s appointment of the anti-pope Cadalus of Parma; Agnes made the appointment on the advice of imperial counsellors in October 1061, after the duly elected pope, Anselm of Lucca (Alexander II) was enthroned without waiting for imperial assent.
Online at Epistolae (See also Bibliographia record )