[2][3] After he came into conflict with Frederick I, Archbishop of Salzburg for the ecclesiastic jurisdiction in Pannonia, Pilgrim forged the papal bulls.
[2] Pilgrim believed that Lauriacum (now Lorch in Enns in Austria) was the metropolitan see of the Diocese of Pannonia in the Roman Empire.
A total of five papal bulls were forged and one of the letters from Hatto of Mainz to an unknown Pope, attempted to prove that Lorch was an archiepiscopal see before Salzburg.
One of the specific contents involved the claim that Saint Peter sent missionaries to convert Lorch in the year 47 and establish a see.
[5] Furthermore, the documents also indicated that Passau be endowed with a vast archdiocese, immense property, and no less than twenty-two suffragan bishoprics including Grado, Wurzburg, and Prague.