[6] Desiderius confronted with papal interests in 1210, when Alexander Hont-Pázmány, the ispán of Somogy County founded a church dedicated to Saint Peter in the territory of the Diocese of Csanád and requested to place it under the direct authority of the Holy See.
[7] Desiderius was present in England on 7 July 1220, when Thomas Becket's remains were moved from his first tomb to a shrine, in the recently completed Trinity Chapel.
The event was attended by King Henry III, the papal legate Pandulf Verraccio, the Archbishop of Canterbury Stephen Langton and large numbers of dignitaries and magnates secular and ecclesiastical throughout from Europe.
An unidentified Hungarian archbishop (either John of Esztergom or Ugrin Csák of Kalocsa) among the guests is referred by Walter of Coventry in his work Memoriale, when described the events.
[8] According to a bull of Pope Honorius III issued on 15 December 1220, Desiderius was robbed by burghers of Pavia when, in the course of a pilgrimage, he traveled through the city on his way back to Hungary.
[9] The document narrates the burghers misidentified him with Alexander, Bishop of Várad, who owed significant amounts to them, and seized his golds, horses, clothes and carriage.
[9] Historian László Solymosi considered Desiderius was able to participate in the pilgrimage in England because of his affiliation with the Cistercians and for the similar martyrdom of Gerard of Csanád and Thomas Becket.
Previously, Andrew II sold and mortgaged royal estates – including the abbey's benefits – to finance his campaign to the Holy Land, which became part of the wider Fifth Crusade.
Following that Desiderius established a provostry in the place of the abbey and donated the surrounding villages – Csene, Papd (today parts of the commune of Cenei in Romania) and Ivánkahida – to its secular chapter.
[14] Desiderius died in late 1228,[3] however, it is possible that he was still alive in early 1229, when Pope Gregory IX asked the opinions of two bishops – the suffragans of Transylvania (Raynald of Belleville) and Csanád who are not called by name – about the establishment of the Diocese of Syrmia.