According to its narration, "bishop Desiderius" (without mentioning his specific see) mediated the peace negotiations, when Solomon, King of Hungary and his rebellious cousins, dukes Géza, Ladislaus and Lampert reached an agreement, which was signed in Győr on 20 January 1064.
[5] When comes Peter Aba, founder of the monastery, requested exemption from the tax payments (tithe), both King Solomon and Desiderius approved it (despite the fact that the abbey laid in the territory of the Diocese of Eger, a subordinate to Esztergom).
[1] The Illuminated Chronicle refers to him simply as archbishop Desiderius, and narrates that King Géza celebrated Christmas at Szekszárd Abbey in 1076.
[7] Historian László Koszta argued the above-mentioned chapters of the Illuminated Chronicle were written during the reign of Coloman, King of Hungary.
For instance, that rivalry also appeared in the coeval Life of King Stephen of Hungary, compiled by Hartvik, Bishop of Győr (thus a subordinate to Lawrence), when it derived the title of the superior of Kalocsa from Esztergom, emphasizing its subsidiarity.