 The diploma specially mentions the church of S. Alessandro in Fara, which Bishop John converted from the Arian heresy to the Catholic faith.On 23 June 904 King Berengar I of Italy ordered Bishop Adelbertus and the citizens of Bergamo to rebuild the walls which had been destroyed during the incursion of the Hungarians.In return for this service, the King confirmed and strengthened the Bishop's civil control over the city and area, even against his officials and feudal vassals.